oparl: ignore if nothing to commit

hosts/containers/oparl/default.nix

@@ -93,19 +93,19 @@ in
       scrape
       pushd data
       find . -name \*.json -exec git add "{}" +
-      git commit -m update
+      git commit -m update || true
       popd
 
       meetings2ics data/meetings/ > data/meetings.ics
       pushd data
       git add meetings.ics
-      git commit -m "update meetings.ics"
+      git commit -m "update meetings.ics" || true
       popd
 
       files_extract
       pushd data
       find . -name \*.txt -exec git add {} +
-      git commit -m update\ text
+      git commit -m update\ text || true
       git push origin master
     '';
   };