config compute readme (#18019)

Author: BigCat20196

specification/compute/resource-manager/readme.md

@@ -269,6 +269,15 @@ input-file:
 - Microsoft.Compute/stable/2021-03-01/cloudService.json
 ```
 
+### Tag: package-2021-12-01-only
+
+These settings apply only when `--tag=package-2021-12-01-oly` is specified on the command line.
+
+``` yaml $(tag) == 'package-2021-12-01-only'
+input-file:
+- Microsoft.Compute/stable/2021-12-01/disk.json
+```
+
 ### Tag: package-2021-11-01
 
 These settings apply only when `--tag=package-2021-11-01` is specified on the command line.

specification/compute/resource-manager/readme.python.md

@@ -36,6 +36,7 @@ Generate all API versions currently shipped for this package
 ```yaml $(multiapi)
 clear-output-folder: true
 batch:
+  - tag: package-2021-12-01-only
   - tag: package-2021-11-01-only
   - tag: package-2021-10-01-only
   - tag: package-2021-08-01-only
@@ -72,6 +73,17 @@ clear-output-folder: false
 perform-load: false
 ```
 
+
+### Tag: package-2021-12-01-only
+
+These settings apply only when `--tag=package-2021-12-01-only --python` is specified on the command line.
+Please also specify `--python-sdks-folder=<path to the root directory of your azure-sdk-for-python clone>`.
+
+``` yaml $(tag) == 'package-2021-12-01-only'
+namespace: azure.mgmt.compute.v2021_12_01
+output-folder: $(python-sdks-folder)/compute/azure-mgmt-compute/azure/mgmt/compute/v2021_12_01
+```
+
 ### Tag: package-2021-11-01-only
 
 These settings apply only when `--tag=package-2021-11-01-only --python` is specified on the command line.