chore(deps): update google-github-actions/auth action to v2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
google-github-actions/auth	action	major	v1 -> v2

---

Release Notes

google-github-actions/auth (google-github-actions/auth)

### [`v2`](https://togithub.com/google-github-actions/auth/releases/tag/v2) [Compare Source](https://togithub.com/google-github-actions/auth/compare/v1...v2) Floating v2 alias

---

Configuration

📅 Schedule: Branch creation - "before 4am on Monday" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.

[github-actions[bot]]

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (4302ebf) 55.04% compared to head (e87c31f) 55.10%. Report is 2 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2227 +/- ## ========================================== + Coverage 55.04% 55.10% +0.05% ========================================== Files 683 683 Lines 114533 114533 ========================================== + Hits 63050 63109 +59 + Misses 47586 47528 -58 + Partials 3897 3896 -1 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[github-actions[bot]]

Coverage from tests in ./e2e_test/... for ./consensus/istanbul/... at commit 62a7492f32590fd3b6298960555d1011118ecf18

coverage: 50.8% of statements across all listed packages

coverage:  63.4% of statements in consensus/istanbul
coverage:  42.7% of statements in consensus/istanbul/announce
coverage:  55.7% of statements in consensus/istanbul/backend
coverage:   0.0% of statements in consensus/istanbul/backend/backendtest
coverage:  24.3% of statements in consensus/istanbul/backend/internal/replica
coverage:  65.3% of statements in consensus/istanbul/core
coverage:  50.0% of statements in consensus/istanbul/db
coverage:   0.0% of statements in consensus/istanbul/proxy
coverage:  64.2% of statements in consensus/istanbul/uptime
coverage:  51.8% of statements in consensus/istanbul/validator
coverage:  79.2% of statements in consensus/istanbul/validator/random