chore: Update pre-commit hook error message (#11792)

* Update lint error message

* All lowercase for 'pull request'

scripts/on-lint-error.js

@@ -1,12 +1,10 @@
-console.log(
-  `Gatsby uses precommit hooks to run our linting and style checks. We do this
-  to avoid additional hassle during pull request reviews, so please fix any linting
-  problems before submitting pull request, because all PRs must pass these checks.
-  
-  If you're doing something temporary, you can disable this hook with:
-    git commit --no-verify
-  
-  If you want disable this hook for all future commits:
-    npm run hooks:uninstall
-  `
-)
+console.log(`Oops! Gatsby noticed some lint or style warnings in the code for this
+commit. Your changes have been committed, but you should fix the warnings before
+creating a pull request.
+
+Use 'npm run lint' to manually re-run these checks. You can also disable these
+checks:
+
+- for a single commit: git commit --no-verify
+- for all future commits: npm run hooks:uninstall
+`)