fix(ci): remove duplicate cargo/services/indexer dependabot entry

[wheval]

Summary

• Removes a duplicate package-ecosystem: cargo / directory: /services/indexer block from .github/dependabot.yml (one single-quoted, one double-quoted copy of the same entry).
• GitHub was rejecting the config as invalid, which failed the Dependabot configuration check on PRs (including after CI fixes: workflow schema errors, Rust lint, e2e test bugs, dependency audit #978).

Test plan

• YAML still has exactly one cargo entry each for /contracts and /services/indexer, plus npm and github-actions.
• Confirm Dependabot config check is green on this PR (no more “Your .github/dependabot.yml contained invalid details”).
• Optional: after merge, Dependabot can open indexer cargo update PRs again without config errors.

Summary by CodeRabbit

• Chores
  • Standardized formatting in the automated dependency update configuration.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 65d921ec-b2bc-4297-bdf3-11724bc50ad4

📥 Commits

Reviewing files that changed from the base of the PR and between 7c31505 and 3c7437e.

📒 Files selected for processing (1)

• .github/dependabot.yml

💤 Files with no reviewable changes (1)

• .github/dependabot.yml

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📝 Walkthrough

Walkthrough

Updated the /services/indexer Cargo entry in .github/dependabot.yml so its dependencies and rust labels match the surrounding YAML quoting style.

Changes

Dependabot configuration

Layer / File(s)	Summary
Align indexer dependency labels .github/dependabot.yml	The /services/indexer Cargo update labels use consistent single-quoted formatting.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The title claims a duplicate Dependabot entry was removed, but the PR summary shows only formatting changes to labels in .github/dependabot.yml.	Rename the title to describe the actual Dependabot YAML formatting change in /services/indexer, or update the changeset if duplicate removal was intended.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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