awb.yml: Try restoring NuGet packages

git-svn-id: https://svn.code.sf.net/p/autowikibrowser/code/AWB@12775 5227b50d-9349-4574-b055-4b0a7525e11c

Author: reedy

.github/workflows/awb.yml

@@ -15,6 +15,9 @@ jobs:
       - uses: actions/checkout@v4
       - name: Setup MSBuild
         uses: microsoft/setup-msbuild@v2
+      - name: Restore NuGet
+        uses: nuget/setup-nuget@v2
+        run: nuget restore 'AutoWikiBrowser no plugins.sln'
       - name: Build
         run: |
             MSBuild.exe $Env:GITHUB_WORKSPACE\'AutoWikiBrowser no plugins.sln' /p:Configuration=Release