Update usage of implemented suggestions

examples/survey-feedback-analysis/main.bal

@@ -32,22 +32,22 @@ final slack:Client slack = check new ({
 public function main() returns error? {
 
     // Create a new channel for the survey
-    json|error createChannelResponse = check slack->/conversations\.create.post({name: channelName});
+    json|error createChannelResponse = slack->/conversations\.create.post({name: CHANNEL_NAME});
     if createChannelResponse is error {
         log:printError("Error creating the survey conversation: " + createChannelResponse.message());
         return;
     }
 
     // Post a message to the conversation created and get the timestamp of the message
-    json|error sendMsgResponse = slack->/chat\.postMessage.post({channel: channelName, text: surveyRequestMessage});
+    json|error sendMsgResponse = slack->/chat\.postMessage.post({channel: CHANNEL_NAME, text: SURVEY_REQUEST_MSG});
     if sendMsgResponse is error {
         log:printError(sendMsgResponse.message());
         return;
     }
     string messageTimestamp = check sendMsgResponse.message.ts;
 
     // Check for replies to the survey message
-    json|error repliesResponse = slack->/conversations\.replies({channel: channelName, ts: messageTimestamp});
+    json|error repliesResponse = slack->/conversations\.replies({channel: CHANNEL_NAME, ts: messageTimestamp});
     if repliesResponse is error {
         log:printError(repliesResponse.message());
         return;