chore: Update validate-pr workflow

[stephanie-anderson]

Update validate-pr action to getsentry/github-workflows@71588dd.

Changes included:

• Skip all checks when a maintainer reopens a PR (feat(validate-pr): Skip all checks when a maintainer reopens a PR github-workflows#161)
• Skip checks for users with write access (feat(validate-pr): Skip checks for users with write access github-workflows#162)

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

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New Features ✨

• Add attachAllThreads option by itaybre in #7764

Bug Fixes 🐛

• Per-instance unmaskView propagates to child views by denrase in #7733

Documentation 📚

• Add SentryCrash analysis and improvement plan document by itaybre in #7528

Internal Changes 🔧

Deps

• Bump ruby/setup-ruby from 1.295.0 to 1.298.0 by dependabot in #7751
• Bump codecov/codecov-action from 5.5.3 to 6.0.0 by dependabot in #7749
• Bump getsentry/craft from 2.25.0 to 2.25.2 by dependabot in #7748
• Bump fastlane-plugin-sentry from 2.4.0 to 2.5.0 by dependabot in #7746
• Bump actions/deploy-pages from 4.0.5 to 5.0.0 by dependabot in #7747
• Update clang-format version by sentry-mobile-updater in #7755
• Bump getsentry/craft/.github/workflows/changelog-preview.yml from 2.25.0 to 2.25.2 by dependabot in #7750
• Bump activesupport from 7.2.3 to 7.2.3.1 by dependabot in #7732
• Bump fastlane-plugin-sentry from 2.3.0 to 2.4.0 by dependabot in #7724
• Bump ruby/setup-ruby from 1.292.0 to 1.295.0 by dependabot in #7728
• Bump getsentry/craft from 2.24.1 to 2.25.0 by dependabot in #7729
• Bump codecov/codecov-action from 5.5.2 to 5.5.3 by dependabot in #7725
• Bump actions/create-github-app-token from 2.2.1 to 3.0.0 by dependabot in #7726
• Bump getsentry/craft/.github/workflows/changelog-preview.yml from 2.24.1 to 2.25.0 by dependabot in #7727
• Bump json from 2.18.1 to 2.19.2 by dependabot in #7709

Other

• Update validate-pr workflow by stephanie-anderson in #7769

• Pin GitHub Actions to full-length commit SHAs by joshuarli in #7730

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_{🤖 This preview updates automatically when you update the PR.}

[itaybre]

LGTM