[SQUASHME] Fix pic

Author: AmirhosseinPoolad

doc/src/arch/reference.rst

@@ -603,7 +603,7 @@ Grid Layout Example
     Defines the interdie wiring between the two sides of the cut. Connectivity is defined using scatter-gather patterns. Starting at 'offset_start' from location of the cut and moving by 'offset_increment' until we reach the location of 'offset_end' away from the cut, 'num' scatter-gather patterns defined by 'sg_name' and 'sg_link' will be instantiated.
     Note that these offset points always define the starting point of the scatter-gather pattern's sg_link.
 
-    .. figure:: scatter_gather_images/interposer_diagram.svg
+    .. figure:: scatter_gather_images/interposer_diagram.png
         An example of how specifying interposers in VTR works. Connections between the two sides of a cut are first severed. The two sides are then reconnected using scatter_gather patterns. Note that there are 'num' of each pattern at each switchblock locations.
 
 .. _arch_device_info: