update github workflow for handling dependabot version update pull requests

[rtpascual]

Changes

Update the name of the workflow to match the new name of the script.

Set the GitHub token for the script to use.

Corresponding docs PR, if applicable:

Validation

Checklist

• If this PR includes a functional change to the runtime behavior of the code, I have added or updated automated test coverage for this change.
• If this PR requires a change to the Project Architecture README, I have included that update in this PR.
• If this PR requires a docs update, I have linked to that docs PR above.
• If this PR modifies E2E tests, makes changes to resource provisioning, or makes SDK calls, I have run the PR checks with the run-e2e label set.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

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Latest commit: 1412208

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