Backports for 2.1.1 beta (#9599)

* parity: bump version to 2.1.1 beta

* ci: fix regex 🙄

* docs(rpc): annotate tag with the provided message

scripts/gitlab/rpc-docs.sh

@@ -34,7 +34,7 @@ commit_files() {
     git checkout -b rpcdoc-update-${CI_COMMIT_REF_NAME}
     git add .
     git commit -m "Update docs to ${CI_COMMIT_REF_NAME}"
-    git tag -a "${CI_COMMIT_REF_NAME}"
+    git tag -a "${CI_COMMIT_REF_NAME}" -m "Update RPC docs to ${CI_COMMIT_REF_NAME}"
 }
 
 upload_files() {