Update check.yml with 3.13

Author: rffontenelle

.github/workflows/check.yml

@@ -7,7 +7,7 @@ on:
   workflow_call:
   pull_request:
     branches:
-      - '3.12'
+      - '3.13'
     paths:
       - '.github/workflows/check.yml'
       - '.github/scripts/prepmsg.sh'
@@ -18,7 +18,7 @@ on:
       - '**/*.po'
   push:
     branches:
-      - '3.12'
+      - '3.13'
     paths:
       - '.github/workflows/check.yml'
       - '.github/scripts/prepmsg.sh'