[mhwd-kernel] fix linux-rt display

scripts/mhwd-kernel

@@ -61,7 +61,8 @@ kernel_repo() {
 kernel_list() {
     printf "\e[32mCurrently running:\e[0m $(uname -r) (${current})\n"
     echo "The following kernels are installed in your system:"
-    pacman -Qqs "^linux[0-9][0-9]?.*[0-9t]$" | while read -r; do echo "   * $REPLY"; done
+    pacman -Qqs "^linux[0-9][0-9]?([0-9])$" | while read -r; do echo "   * $REPLY"; done
+    pacman -Qqs "^linux[0-9][0-9]?([0-9])-rt$" | while read -r; do echo "   * $REPLY"; done
 }
 
 kernel_remove() {