Update UpdateReadme.yml

Author: ocots

.github/workflows/UpdateReadme.yml

@@ -7,6 +7,7 @@ on:
 
 jobs:
   call-shared:
+    if: ${{ hashFiles('README.template.md') != '' }}   # only run if the file exists
     uses: control-toolbox/CTActions/.github/workflows/update-readme.yml@main
     with:
       template_file: README.template.md