Enable checking commit messages/pull requests

Author: jsoref

.github/workflows/spelling.yml

@@ -105,6 +105,7 @@ jobs:
           report-timing: 1
           warnings: bad-regex,binary-file,deprecated-feature,ignored-expect-variant,large-file,limited-references,no-newline-at-eof,noisy-file,non-alpha-in-dictionary,token-is-substring,unexpected-line-ending,whitespace-in-dictionary,minified-file,unsupported-configuration,no-files-to-check,unclosed-block-ignore-begin,unclosed-block-ignore-end
           experimental_apply_changes_via_bot: 1
+          check_commit_messages: commits, title, description
           use_sarif: 1
           extra_dictionary_limit: 20
           dictionary_source_prefixes: >