fix(ci): add GITHUB_TOKEN to ShellCheck step to avoid rate limits

The shellcheck npm package downloads the ShellCheck binary from GitHub
releases at runtime. Without authentication, GitHub API requests hit
the 60 req/hr rate limit on shared runner IPs, causing intermittent
403 errors.

This was already fixed in bash-e2e-lint.yaml (PR #4049) but was not
carried over when the ShellCheck step was added to e2e-tests-lint.yaml
in PR #5002.

Assisted-by: OpenCode

Author: zdrapela

.github/workflows/e2e-tests-lint.yaml

@@ -43,6 +43,8 @@ jobs:
 
       - name: Run ShellCheck
         working-directory: ./e2e-tests
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: yarn shellcheck
 
       - name: Run Oxfmt check