chore: update version.json for release (#968)

* Update version.json

* Update release-tests.yml

Author: oZakari

Diff for: .github/workflows/release-tests.yml

@@ -28,7 +28,7 @@ jobs:
 
       - name: Pester Tests
         id: pester
-        if: startsWith(github.head_ref, 'release')
+        if: contains(github.head_ref, 'release')
         uses: azure/powershell@53dd145408794f7e80f97cfcca04155c85234709 # v2.0.0
         with:
           inlineScript: |

Diff for: version.json

@@ -1,6 +1,6 @@
 {
-  "version": "0.20.2",
-  "gitTag": "v0.20.2",
-  "releaseNotes": "https://github.com/Azure/ALZ-Bicep/releases/tag/v0.20.2",
-  "releaseDateTimeUTC": "20250106T1930490000Z"
+  "version": "0.21.0",
+  "gitTag": "v0.21.0",
+  "releaseNotes": "https://github.com/Azure/ALZ-Bicep/releases/tag/v0.21.0",
+  "releaseDateTimeUTC": "20250221T1830000000Z"
 }