Update UpdateReadme.yml

Author: ocots

.github/workflows/UpdateReadme.yml

@@ -7,12 +7,13 @@ 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
       output_file: README.md
       package_name: CTAppTemplate   # package for INSTALL.md
       repo_name: CTAppTemplate.jl   # repository for CONTRIBUTING.md links
-      citation_badge: "[![DOI](https://zenodo.org/badge/541187171.svg)](https://zenodo.org/doi/10.5281/zenodo.16753152)" # example of Zenodo badge
+      citation_badge: "[![DOI](https://zenodo.org/badge/541187171.svg)](https://zenodo.org/doi/10.5281/zenodo.16753152)" # example, can be empty
       assignee: "ocots"
     secrets: inherit