Skip bot users when collecting PR authors while prepping release (#51386)

Author: amoghrajesh

dev/breeze/src/airflow_breeze/commands/release_management_commands.py

@@ -3856,7 +3856,9 @@ def generate_issue_content(
                         progress.console.print(
                             f"Failed to retrieve linked issue #{linked_issue_number}: Unknown Issue"
                         )
-            users[pr_number].add(pr.user.login)
+            # do not add bot users to the list of users
+            if not pr.user.login.endswith("[bot]"):
+                users[pr_number].add(pr.user.login)
             for linked_issue in linked_issues[pr_number]:
                 users[pr_number].add(linked_issue.user.login)
             progress.advance(task)