.github/workflows/Generate-TestWorkflows.ps1: Added cache step with key based on all MSBuild files that manage package versions and references

Author: NightOwl888

.github/workflows/Generate-TestWorkflows.ps1

@@ -295,7 +295,18 @@ jobs:
         with:
           dotnet-version: '$DotNet9SDKVersion'
 
-      - name: Restore dependencies
+      - name: Cache NuGet Packages
+        uses: actions/cache@v4
+        with:
+          # '**/*.*proj' includes .csproj, .vbproj, .fsproj, msbuildproj, etc.
+          # '**/*.props' includes Directory.Packages.props, Directory.Build.props and Dependencies.props
+          # '**/*.targets' includes Directory.Build.targets
+          # '**/*.sln' and '*.sln' ensure root solution files are included (minimatch glitch for file extension .sln)
+          # 'global.json' included for SDK version changes
+          key: nuget-`${{ runner.os }}-`${{ hashFiles('**/*.*proj', '**/*.props', '**/*.targets', '**/*.sln', '*.sln', 'global.json') }}
+          path: `${{ env.NUGET_PACKAGES }}
+
+      - name: Restore
         run: dotnet restore /p:TestFrameworks=true
 
       - name: Setup Environment Variables