Update build.yml

Updated cron schedule to build every Sunday at midnight

Previous cron schedule was meant to run on the first of every month, but was actually set to run on the first of every month if-and-only-if it was a Sunday.

Also use a queue-time Build.OfficialRelease value instead of a variable defined in the build.yml file.

azure-pipelines/build.yml

@@ -1,26 +1,31 @@
 # This Yaml Document has been converted by ESAI Yaml Pipeline Conversion Tool.
 name: $(Date:yyyyMMdd).$(Rev:r)
+parameters:
+- name: OfficialRelease
+  displayName: "Build and publish an official release"
+  type: boolean
+  default: false
 variables:
 - name: BuildParameters.vsVersion
   value: 17.0
 - name: Build.OfficialRelease
-  value: false
+  value: ${{ parameters.OfficialRelease }}
 - name: Codeql.Enabled
   value: true
 - name: Codeql.Language
   value: csharp
 - name: SignType
-  ${{ if eq(variables['Build.OfficialRelease'], 'true') }}:
+  ${{ if eq(parameters.OfficialRelease, true) }}:
     value: real
   ${{ else }}:
     value: test
 - name: TeamName
   value: vscx-tools-authoring
 - name: TimestampPackage
-  value: true
+  value: ${{ not (parameters.OfficialRelease) }}
 schedules:
-- cron: '0 0 1 * 0'
-  displayName: Monthly CodeQL Build
+- cron: '0 0 * * 0'
+  displayName: Weekly CodeQL Build (Sunday @ Midnight)
   branches:
     include:
     - main
@@ -71,7 +76,7 @@ extends:
             publishVstsFeed: 97a41293-2972-4f48-8c0e-05493ae82010
           - output: nuget
             displayName: 'NuGet push to NuGet.org'
-            condition: and(and(succeeded(), eq(variables['Build.OfficialRelease'], 'true')), eq(variables['TimestampPackage'], 'false'))
+            condition: and(succeeded(), eq(variables['Build.OfficialRelease'], 'true'))
             packageParentPath: '$(Build.ArtifactStagingDirectory)\Packages'
             packagesToPush: $(Build.ArtifactStagingDirectory)\Packages\*.nupkg;!$(Build.ArtifactStagingDirectory)\Packages\*.symbols.nupkg
             nuGetFeedType: external
@@ -150,4 +155,4 @@ extends:
             TargetFolder: $(Build.ArtifactStagingDirectory)\Packages
             OverWrite: true
             flattenFolders: true
-          continueOnError: true
+          continueOnError: true