chore(maintenance): add discord link to first PR and first issue (#1493)

Co-authored-by: Heitor Lessa <lessa@amazon.com>

Author: rubenfonseca

.github/boring-cyborg.yml

@@ -95,6 +95,8 @@ labelPRBasedOnFilePath:
 firstPRWelcomeComment: >
   Thanks a lot for your first contribution! Please check out our contributing guidelines and don't hesitate to ask whatever you need.
 
+  In the meantime, check out the #python channel on our AWS Lambda Powertools Discord: [Invite link](https://discord.gg/B8zZKbbyET)
+
 # Comment to be posted to congratulate user on their first merged PR
 firstPRMergeComment: >
   Awesome work, congrats on your first merged pull request and thank you for helping improve everyone's experience!
@@ -103,6 +105,8 @@ firstPRMergeComment: >
 firstIssueWelcomeComment: >
   Thanks for opening your first issue here! We'll come back to you as soon as we can.
 
+  In the meantime, check out the #python channel on our AWS Lambda Powertools Discord: [Invite link](https://discord.gg/B8zZKbbyET)
+
 ###### IssueLink Adder #################################################################################################
 # Insert Issue (Jira/Github etc) link in PR description based on the Issue ID in PR title.
 #insertIssueLinkInPrDescription: