Fixed an issue with setting the NuGet package version when running via tag push

Author: penev92

.github/workflows/build-nuget.yml

@@ -80,12 +80,12 @@ jobs:
 
             - name: Package NuGet
               run: |
-                nuget pack OpenRA-OpenAL-CS.nuspec -OutputDirectory ./nuget -version ${{ github.event.inputs.nugetPackageVersion }}
+                nuget pack OpenRA-OpenAL-CS.nuspec -OutputDirectory ./nuget -version ${{ env.PACKAGE_VERSION }}
 
             - name: Upload NuGet package to Artifacts
               uses: actions/upload-artifact@v3
               with:
-                name: NuGet Package ${{ github.event.inputs.nugetPackageVersion }}
+                name: NuGet Package ${{ env.PACKAGE_VERSION }}
                 path: ./nuget
 
             - name: Tag a release