Update regex for version validation

.github/workflows/gradle-release.yml

@@ -36,7 +36,7 @@ jobs:
 
       - name: Validate versions
         run: |
-          VERSION_REGEX="^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(-(0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(\.(0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*)?(\+[0-9a-zA-Z-]+(\.[0-9a-zA-Z-]+)*)?$"
+          VERSION_REGEX="^(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(-((0|[1-9][0-9]*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(\.(0|[1-9][0-9]*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(\+([0-9a-zA-Z-]+(\.[0-9a-zA-Z-]+)*))?$"
 
           echo "Checking if version and nextVersion comply with semantic versioning..."
           if [[ ! "${{ github.event.inputs.version }}" =~ $VERSION_REGEX ]] || [[ ! "${{ github.event.inputs.nextVersion }}" =~ $VERSION_REGEX ]]; then