Update runner os to latest ubuntu (#10)

Signed-off-by: Simon Davies <simongdavies@users.noreply.github.com>

Author: simongdavies

.github/workflows/CreateReleaseBranch.yml

@@ -14,7 +14,7 @@ permissions:
 
 jobs:
   create-branch:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v4