Update release.yml

Author: janolaveide

.github/workflows/release.yml

@@ -43,4 +43,4 @@ jobs:
         run: |
           git config user.email "[email protected]"
           git config user.name "GitHub Actions release"
-          mvn  --settings .m2/settings.xml  release:rollback
+          mvn  -T4 --settings .m2/settings.xml  release:rollback