Bump Apple-Actions/import-codesign-certs from 5 to 6 (#1549)

Bumps [Apple-Actions/import-codesign-certs](https://github.com/apple-actions/import-codesign-certs) from 5 to 6.
- [Release notes](https://github.com/apple-actions/import-codesign-certs/releases)
- [Commits](https://github.com/apple-actions/import-codesign-certs/compare/v5...v6)

---
updated-dependencies:
- dependency-name: Apple-Actions/import-codesign-certs
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/release.yml

@@ -75,7 +75,7 @@ jobs:
 
       - name: Import certificates
         if: env.HAS_SIGNING_CREDS == 'true'
-        uses: Apple-Actions/import-codesign-certs@v5
+        uses: Apple-Actions/import-codesign-certs@v6
         with:
           p12-file-base64: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_P12_BASE64 }}
           p12-password: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_PASSWORD }}