Fix line counting of commit message hook

The parenthesis was accidentally deleted in the previous commit.

Change-Id: I8938e339057335d1604f535d3695ffd242bb8e92

Author: lumynou5

scripts/commit-msg.hook

@@ -208,7 +208,7 @@ build_commit_trailer_regex() {
       TRAILER_REGEX+="$each|"
     done
     # Remove the trailing pipe, then add a separator and blank space pattern.
-    TRAILER_REGEX="${TRAILER_REGEX%|})[$separators][[:blank:]]*"
+    TRAILER_REGEX="${TRAILER_REGEX%|})[$separators][[:blank:]]*)"
   fi
 
   # Append standalone trailer keys.