Bug 2817823: [Programmatic access - Cosmos DB Query Copilot - Query]: Accessible name is not defined for the 'Like', 'Dislike' and 'Send' buttons present on the page. (#1700)

* text color of link has been changed to get the contrast ratio of atleaast 4.5:1

* screen reader names have been added to the buttons

* Update QueryCopilotPromptbar.tsx

src/Explorer/QueryCopilot/QueryCopilotPromptbar.tsx

@@ -377,6 +377,7 @@ export const QueryCopilotPromptbar: React.FC<QueryCopilotPromptProps> = ({
           disabled={isGeneratingQuery || !userPrompt.trim()}
           style={{ marginLeft: 8 }}
           onClick={() => startGenerateQueryProcess()}
+          aria-label="Send"
         />
         {isGeneratingQuery && <Spinner style={{ marginLeft: 8 }} />}
         {showSamplePrompts && (
@@ -552,6 +553,7 @@ export const QueryCopilotPromptbar: React.FC<QueryCopilotPromptProps> = ({
             id="likeBtn"
             style={{ marginLeft: 20 }}
             iconProps={{ iconName: likeQuery === true ? "LikeSolid" : "Like" }}
+            aria-label="Like"
             onClick={() => {
               setShowCallout(!likeQuery);
               setLikeQuery(!likeQuery);
@@ -571,6 +573,7 @@ export const QueryCopilotPromptbar: React.FC<QueryCopilotPromptProps> = ({
               setDislikeQuery(!dislikeQuery);
               setShowCallout(false);
             }}
+            aria-label="Dislike"
           />
           <Separator vertical style={{ color: "#EDEBE9" }} />
           <CommandBarButton