Fix bogus templates/ self-match in delete-detection step

git ls-tree -d --name-only \$SHA -- templates matched the templates/
directory entry itself (basename "templates"), so every run tried and
harmlessly failed to delete a nonexistent profiles-templates template.
Use 'templates/*' as the pathspec to list only the child directories.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.gitea/workflows/coder-templates.yml

@@ -61,7 +61,7 @@ jobs:
             exit 0
           fi
 
-          OLD_DIRS="$(git ls-tree -d --name-only "$PREV_SHA" -- templates 2>/dev/null | xargs -n1 basename 2>/dev/null || true)"
+          OLD_DIRS="$(git ls-tree -d --name-only "$PREV_SHA" -- 'templates/*' 2>/dev/null | xargs -n1 basename 2>/dev/null || true)"
           if [ -z "$OLD_DIRS" ]; then
             echo "No templates/ directory at $PREV_SHA, nothing to diff. Skipping."
             exit 0