add feature based on Gabe's feedback to checkout the right zarf versi…

…on to avoid injector to version mismatch but fixed a stupid mistake

.github/workflows/update-zarf-injector.yaml

@@ -20,7 +20,7 @@ jobs:
         id: zarf_version
         run: |
           # Extract the Zarf version from the zarf-config.yaml file
-          zarf_version=$(grep 'injector_version:' zarf-config.yaml | cut -d'"' -f2)
+          zarf_version=$(grep 'agent_image_tag:' zarf-config.yaml | cut -d'"' -f2)
           echo "Zarf Version: $zarf_version"
           echo "zarf_version=$zarf_version" >> $GITHUB_ENV