update review comments

Author: joviegas

.changes/next-release/bugfix-AWSSDKforJavav2-f9f830e.json

@@ -2,5 +2,5 @@
     "type": "bugfix",
     "category": "AWS SDK for Java v2",
     "contributor": "",
-    "description": "Skip User-Agent header modification in ApplyUserAgentStage when custom User-Agent is already provided."
+    "description": "ApplyUserAgentStage will not overwrite the custom User-Agent"
 }

core/sdk-core/src/main/java/software/amazon/awssdk/core/internal/http/pipeline/stages/ApplyUserAgentStage.java

@@ -68,7 +68,7 @@ public ApplyUserAgentStage(HttpClientDependencies dependencies) {
     public SdkHttpFullRequest.Builder execute(SdkHttpFullRequest.Builder request,
                                               RequestExecutionContext context) throws Exception {
 
-        if (hasUserAgentInAdditionalHeaders() || hasUserAgentInRequestHeaders(context)) {
+        if (hasUserAgentInAdditionalHeaders() || hasUserAgentInRequestConfig(context)) {
             return request;
         }
         String headerValue = finalizeUserAgent(context);
@@ -88,10 +88,10 @@ private boolean hasUserAgentInAdditionalHeaders() {
     }
 
     /**
-     * Checks if User-Agent header is present in request-level headers.
+     * Checks if User-Agent header is present in request override configs.
      * We skip adding user-agent in the ApplyUserAgentStage if user has set "User-Agent" header at request level
      */
-    private boolean hasUserAgentInRequestHeaders(RequestExecutionContext context) {
+    private boolean hasUserAgentInRequestConfig(RequestExecutionContext context) {
         Map<String, List<String>> requestHeaders = context.requestConfig().headers();
         if (requestHeaders == null) {
             return false;