Grand write-all permission for auto-bump workflow

Fixes errors like:

```
remote: Permission to dahlia/homebrew-jetbrains-eap.git denied to hong-bot.
fatal: unable to access 'https://github.com/dahlia/homebrew-jetbrains-eap/': The requested URL returned error: 403
Error: Failure while executing; `/usr/bin/env git push --set-upstream ***github.com/dahlia/homebrew-jetbrains-eap bump-intellij-idea-eap-2026.1-261.17801.55:bump-intellij-idea-eap-2026.1-261.17801.55` exited with 128. Here's the output:
remote: Permission to dahlia/homebrew-jetbrains-eap.git denied to hong-bot.
fatal: unable to access 'https://github.com/dahlia/homebrew-jetbrains-eap/': The requested URL returned error: 403
```

Copied from https://github.com/Goooler/homebrew-repo/blob/3048e83471efa2c806e92e74c91633cbfcc4c18e/.github/workflows/autobump.yml#L21C5

Author: Goooler

.github/workflows/bump.yml

@@ -11,6 +11,7 @@ jobs:
   bump:
     runs-on: macos-latest
     if: github.event.repository.fork == false
+    permissions: write-all
     steps:
       - name: Set up Git
         run: |