CM4 pages - minor grammar fixups (raspberrypi#1706)

* Update datasheet.md

* Update designfiles.md

* Update schematics.md

* Update README.md

* Update schematics.md

* Update schematics.md

Co-authored-by: James Hughes <[email protected]>

Author: andrum99

hardware/computemodule/datasheet.md

@@ -1,6 +1,6 @@
 # Compute Module Datasheet
 
-The latest version of the Compute Module is the CM4. This is the recommended Compute Module for all current and future development. 
+The latest version of the Compute Module is the CM4: this is the recommended Compute Module for all current and future development. 
 
 [Compute Module 4 Datasheet](http://datasheets.raspberrypi.org/cm4/cm4-datasheet.pdf)  
 [Compute Module 4 IO Board Datasheet](http://datasheets.raspberrypi.org/cm4io/cm4io-datasheet.pdf)

hardware/computemodule/designfiles.md

@@ -1,18 +1,18 @@
 # Compute Module IO board and camera/display adapter board design data
 
-Design data for the Compute Module 4 IO board can be found in its datasheet
+Design data for the Compute Module 4 IO board can be found in its datasheet:
 
 - [Compute Module 4 IO Board datasheet](http://datasheets.raspberrypi.org/cm4io/cm4io-datasheet.pdf)
 
-There is also a KiCAD PCB design set available.
+There is also a KiCAD PCB design set available:
 
  - [Compute Module 4 IO Board KiCAD files](http://datasheets.raspberrypi.org/cm4io/CM4IO-KiCAD.zip)
 
-## Design data for Compute Module IO board (CMIO) prior to the Compute Module 4.
+## Design data for Compute Module IO board (CMIO) prior to the Compute Module 4
 
 * [CMIO Rev 1.2](designdata/rpi_DSGN_CMIO_1p2.zip)
 * [CMIO Rev 3.0](designdata/rpi_DSGN_CMIO_3p0.zip)
 
-Design data for the Compute Module camera/display adapter board (CMCDA)
+Design data for the Compute Module camera/display adapter board (CMCDA):
 
 * [CMCDA Rev 1.1](designdata/rpi_DSGN_CMCDA_1p1.zip)

hardware/computemodule/schematics.md

@@ -1,19 +1,18 @@
 # Compute Module and related schematics
 
-Schematics for the latest Compute Module 4 and the IO board can be found in the datasheets as follows:
+Note that schematics are not available for the Compute Module 4, but are available for the IO board.
 
-* [Compute Module 4 Datasheet](http://datasheets.raspberrypi.org/cm4/cm4-datasheet.pdf)
-* [Compute Module 4 IO Board datasheet](http://datasheets.raspberrypi.org/cm4io/cm4io-datasheet.pdf)
+* [Compute Module 4 IO Board datasheet including schematics](http://datasheets.raspberrypi.org/cm4io/cm4io-datasheet.pdf)
 
-There is also a KiCAD PCB design set available.
+There is also a KiCAD PCB design set available:
 
  * [Compute Module 4 IO Board KiCAD files](http://datasheets.raspberrypi.org/cm4io/CM4IO-KiCAD.zip)
 
-Schematics for the Compute Module camera/display adapter board (CMCDA)
+Schematics for the Compute Module camera/display adapter board (CMCDA):
 
 * [CMCDA Rev 1.1](schematics/rpi_SCH_CMCDA_1p1.pdf)
 
-Schematic for an under-voltage detection circuit, as used in most models of Raspberry Pi
+Schematic for an under-voltage detection circuit, as used in most models of Raspberry Pi:
 
 * [Under-voltage detect](schematics/under_voltage_detect.png)
 
@@ -22,7 +21,7 @@ Schematic for an under-voltage detection circuit, as used in most models of Rasp
 * [CM Rev 1.1](schematics/rpi_SCH_CM_1p1.pdf)
 * [CM3 and CM3L Rev 1.0](schematics/rpi_SCH_CM3_1p0.pdf)
 
-Schematics for the Compute Module IO board (CMIO). 
+Schematics for the Compute Module IO board (CMIO):
 
 * [CMIO Rev 1.2 (Supports CM1 only)](schematics/rpi_SCH_CMIO_1p2.pdf)
 * [CMIO Rev 3.0 (Supports CM1, CM3, CM3L, CM3+ and CM3+L)](schematics/rpi_SCH_CMIO_3p0.pdf)

hardware/raspberrypi/mechanical/README.md

@@ -50,12 +50,12 @@ Also applicable to the A+.
 
 ## Compute Module 4
 
-The following datasheets contain mechanical drawings and schematics.
+The following datasheets contain mechanical drawings and schematics:
 
 - [Compute Module 4 Datasheet](http://datasheets.raspberrypi.org/cm4/cm4-datasheet.pdf)
 - [Compute Module 4 IO Board datasheet](http://datasheets.raspberrypi.org/cm4io/cm4io-datasheet.pdf)
 
-In addition we also supply STEP files of the Compute modules for 3D modellers and KiCAD files of the IO board for those wishing to create their own PCB's.
+In addition we also supply STEP files of the Compute Modules for 3D modellers and KiCAD files of the IO board for those wishing to create their own PCBs:
 
 - [Compute Module 4 STEP files](https://datasheets.raspberrypi.org/cm4/CM4-step.zip)
 - [Compute Module Lite STEP files](https://datasheets.raspberrypi.org/cm4/CM4Lite-step.zip)