Upgrade GitVersion in workflow

Author: elzik

.github/workflows/continuous-delivery.yml

@@ -22,7 +22,7 @@ jobs:
     - name: GetSemVer
       id: get-semver
       run: |
-        dotnet tool install --global GitVersion.Tool --version 6.1.0
+        dotnet tool install --global GitVersion.Tool --version 6.4.0
         output=$(dotnet-gitversion)
         semver=$(echo $output | grep -oP '"SemVer"\s*:\s*"\K[^"]+')
         echo $output