ci: tweak text in commit title comment

Author: mhanberg

.github/workflows/lint-commit.yaml

@@ -31,6 +31,13 @@ jobs:
 
             We require pull request titles to follow the [Conventional Commits specification](https://www.conventionalcommits.org/en/v1.0.0/) and it looks like your proposed title needs to be adjusted.
 
+            A valid title has a type (feat, bug, chore, etc) followed by and optional scope in parentheses, a colon, a space, and then a subject which starts with a lowercase letter.
+
+            ```
+            feat(engine): add new completions styles
+            bug: correctly index project symbols
+            ```
+
             Details:
 
             ```