workflow: fix build ios simulator for new bucket (#9492) (#9547)

https://github.com/mattermost/mattermost-mobile/actions/runs/21746898064/job/62735186824

This failed with
```
It looks like you might be trying to authenticate with OIDC. Did you mean to set the `id-token` permission? If you are not trying to authenticate with OIDC and the action is working successfully, you can ignore this message.
```

(cherry picked from commit fe62104)

Co-authored-by: Nuno Simões <nasimoes@aiven.io>

Author: mattermost-build

.github/workflows/build-ios-beta.yml

@@ -27,6 +27,9 @@ jobs:
     if: ${{ !contains(github.ref_name, 'beta-ios') }}
     needs:
       - test
+    permissions:
+      id-token: write
+      contents: read
     steps:
       - name: ci/checkout-repo
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2