Adjust issue description for notifications repo (#2376)

Adjust issue description for notifications repo

Based on suggestions in packit/notifications#599

Reviewed-by: Sandro
Reviewed-by: Laura Barcziová
Reviewed-by: Maja Massarini
Reviewed-by: Nikola Forró

packit_service/worker/handlers/forges.py

@@ -117,11 +117,14 @@ def run(self) -> TaskResults:
                     f"{'-stg' if self.service_config.deployment == Deployment.stg else ''}. "
                     "We are now onboarding Fedora contributors who have a valid "
                     "[Fedora Account System](https://fedoraproject.org/wiki/Account_System) "
-                    "account. \n\nIf you have such an account, please set the `GitHub Username`"
+                    "account. \n\nHowever, your GitHub username does not match the FAS account "
+                    "username or you currently don't have the `GitHub Username` field set in your "
+                    "FAS account or your profile is private. "
+                    "Please, set the `GitHub Username`"
                     " field in the settings of the FAS account (if you don't have it set already)"
-                    f" and provide it in a comment in this issue as "
-                    f"`{self.service_config.comment_command_prefix} verify-fas "
-                    "<my-fas-username>` (make sure your profile [is not private]"
+                    f" and provide it in a **comment in this issue** as \n\n"
+                    f"```\n{self.service_config.comment_command_prefix} verify-fas "
+                    "<my-fas-username>\n``` \n\n(and make sure your profile [is not private]"
                     f"(https://accounts.fedoraproject.org/user/{self.sender_login}/"
                     "settings/profile/#is_private)). "
                     "We automatically check for the match between the `GitHub"
@@ -130,7 +133,7 @@ def run(self) -> TaskResults:
                     "match.\n\n"
                     "Here is a link to the settings page:\n"
                     f"https://accounts.fedoraproject.org/user/{self.sender_login}"
-                    "/settings/profile/#github (update the FAS account in the URL if needed)"
+                    "/settings/profile/#github (update the FAS account in the URL if needed)."
                     "\n\n"
                     "For more info, please check out the documentation: "
                     f"{DOCS_APPROVAL_URL}"