Fix: fetch entire depth of commits to avoid detached HEAD.

Author: dblock

.github/workflows/update_api.yml

@@ -1,5 +1,6 @@
 name: Update API from slack-api-ref
 on:
+  workflow_dispatch:
   schedule:
     - cron: "15 23 * * *"
 jobs:
@@ -13,6 +14,7 @@ jobs:
       - uses: actions/checkout@v3
         with:
           submodules: recursive
+          fetch-depth: 0
       - name: Config git to rebase
         run: git config --global pull.rebase true
       - name: Set up Ruby