chore: improve explaining comment

.ci/helm/buildChart.js

@@ -7,7 +7,7 @@ const version = getRequiredEnvVar("VERSION");
 
 await $`helm dependency update helm`;
 
-// replace <<app_version>> in all files in helm/**/Chart.yaml with the value of `version`
+// replace <<app_version>> with the value of `version` in all Chart.yaml files in helm folder
 await $`find helm -name Chart.yaml -exec sed -i -e 's/__app_version__/${version}/g' {} +`;
 
 await $`helm package --version ${version} helm`;