check: hint about chunks cache rebuild

src/borg/archive.py

@@ -2100,7 +2100,7 @@ def valid_item(obj):
 
     def finish(self):
         if self.repair:
-            logger.info("Writing Manifest.")
+            logger.info("Deleting chunks cache in repository - next repository access will cause a rebuild.")
             # we may have deleted chunks, invalidate/remove the chunks index cache!
             try:
                 self.repository.store_delete("cache/chunks_hash")
@@ -2112,6 +2112,7 @@ def finish(self):
             except (Repository.ObjectNotFound, StoreObjectNotFound):
                 # TODO: ^ seem like RemoteRepository raises Repository.ONF instead of StoreONF
                 pass
+            logger.info("Writing Manifest.")
             self.manifest.write()