fix: trim whitespace from plugin version extraction

.gitea/workflows/wp-plugin-release.yml

@@ -46,7 +46,7 @@ jobs:
         run: |
           MAIN_FILE="${{ inputs.main_file }}"
           VERSION=$(grep -E "^\s*\*\s*Version:" -m 1 "$MAIN_FILE" | sed -E 's/.*Version:\s*//')
-          VERSION=$(echo "$VERSION" | tr -d '\r')
+          VERSION=$(echo "$VERSION" | tr -d '\r' | sed -E 's/^[ \t]+//;s/[ \t]+$//')
           if [ -z "$VERSION" ]; then
             echo "::error::Kon pluginversie niet bepalen."
             exit 1