fixed typo

roles/matrix-synapse/tasks/synapse/setup_install.yml

@@ -137,9 +137,9 @@
         [
           {
             "module": "s3_storage_provider.S3StorageProviderBackend",
-            "store_local": matrix_synapse_s3_media_store_on_s3
-            "store_remote": matrix_synapse_s3_media_store_on_local_filesystem
-            "store_synchronous": matrix_synapse_media_storage_provider_s3_store_synchronous
+            "store_local": "matrix_synapse_s3_media_store_on_s3",
+            "store_remote": "matrix_synapse_s3_media_store_on_local_filesystem",
+            "store_synchronous": "matrix_synapse_media_storage_provider_s3_store_synchronous",
             "config": "matrix_synapse_media_storage_provider_s3_config"
           }
         ]