fix(ci): Match scoped conventional-commit prefixes in changelog script

The type regex only matched "type: ", so scoped commits like
"fix(web): ..." all fell into the catch-all Other section instead of
their proper one.

.github/generate_changelog.sh

@@ -27,14 +27,14 @@ label_for() {
 }
 
 commits=$(git log ${range} --reverse --pretty='format:%s')
-known_pattern="^(feat|fix|refactor|perf|docs|test|ci|build|chore): "
+known_pattern="^(feat|fix|refactor|perf|docs|test|ci|build|chore)(\([^)]*\))?!?: "
 
 first_section=1
 for type in $types other; do
   if [ "$type" = "other" ]; then
     entries=$(printf '%s\n' "$commits" | grep -v -E "$known_pattern" | sed 's/^/- /' || true)
   else
-    entries=$(printf '%s\n' "$commits" | grep -E "^${type}: " | sed -E "s/^${type}: /- /" || true)
+    entries=$(printf '%s\n' "$commits" | grep -E "^${type}(\([^)]*\))?!?: " | sed -E "s/^${type}(\([^)]*\))?!?: /- /" || true)
   fi
 
   [ -z "$entries" ] && continue