chore(ci): remove 31 since it is community EOL

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

Author: AndyScherzinger

.github/workflows/update-nextcloud-ocp.yml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        branches: ['main', 'master', 'stable33', 'stable32', 'stable31']
+        branches: ['main', 'master', 'stable33', 'stable32']
 
     name: update-nextcloud-ocp-${{ matrix.branches }}