allow additional_registries to have tag prefix

dist/index.js

@@ -62113,8 +62113,8 @@ function processAdditionalRegistries(targetRegistries) {
     const additionalRegistriesArr = additionalRegistries.split(',');
     for (let registry of additionalRegistriesArr) {
       registry = registry.trim();
-      if (registry.endsWith(':')) {
-        registry = registry.substring(0, registry.length - 1);
+      if (!registry.contains(':')) {
+        registry += ':';
       }
       targetRegistries.push(registry);
     }
@@ -62220,7 +62220,7 @@ function prepareDestinations(registries, tags) {
   const destinations = [];
   registries.forEach((registry) => {
     tags.forEach((tag) => {
-      destinations.push(registry + ':' + tag);
+      destinations.push(registry + tag);
     });
   });
 
@@ -62336,7 +62336,7 @@ try {
 
   let ci_registry = false;
   if (core.getBooleanInput('add_ci_registry_target')) {
-    ci_registry = information.ci_hostname + '/' + repoStr;
+    ci_registry = information.ci_hostname + '/' + repoStr + ':';
     targetRegistries.push(ci_registry);
   }