fix: Improve version determination by trimming whitespace in release workflow

.github/workflows/release.yml

@@ -34,8 +34,8 @@ jobs:
       - name: Determine plugin version
         id: meta
         run: |
-          VERSION=$(grep -E "^\\s*\\*\\s*Version:" -m 1 siti-stock-plugin.php | sed -E 's/.*Version:\\s*//')
-          VERSION=$(echo "$VERSION" | tr -d '\\r')
+          VERSION=$(grep -E "^[[:space:]]*\\*[[:space:]]*Version:" -m 1 siti-stock-plugin.php | sed -E 's/.*Version:[[:space:]]*//')
+          VERSION=$(echo "$VERSION" | tr -d '\\r' | xargs)
           if [ -z "$VERSION" ]; then
             echo "::error::Kon pluginversie niet bepalen."
             exit 1