Skip update checks if in detached state. Lesson learned from 2025 tag.

.includes/update.sh

@@ -26,6 +26,10 @@ update() {
     if ! [[ -d ".git" ]]; then
         return
     fi
+    # Check if we're in a detached HEAD state
+    if ! git symbolic-ref -q HEAD &> /dev/null; then
+        return
+    fi
     local url="$(git ls-remote --get-url)"
     if [[ "$url" =~ ^ssh://|git@|gitea@ ]] || [[ -z "$url" ]]; then
         return