Escape regexp special characters

Apply rebtoor suggestion about adding scaping special characters in role names.
So now roles can have special characters "*" and "." as they're escaped.

Co-authored-by: Roberto Alfieri <[email protected]>
Signed-off-by: Enrique Vallespi Gil <[email protected]>

Author: 2 people

scripts/check-role-prefix.sh

@@ -25,9 +25,10 @@ ROLE_COUNT=$(echo "$CHANGED_ROLES" | tr '|' '\n' | wc -l)
 
 if [ "$ROLE_COUNT" -eq 1 ]; then
     # shellcheck disable=SC1087
-    PATTERN="^[[(]$CHANGED_ROLES[])]"
+    ESCAPED_ROLE=$(printf '%s\n' "$CHANGED_ROLES" | sed 's/[]\.*^$()+?{|]/\\&/g')
+    PATTERN="^[[(]$ESCAPED_ROLE[])]"
 else
-    PATTERN="^[[(]multiple[])]"
+    PATTERN="^[[(](multiple)[])]"
 fi
 
 if ! grep -qE "$PATTERN" <<<"$MSG"; then