add comment about username and deploy token

Author: rerpha

installation_and_upgrade/ibex_install_utils/tasks/server_tasks.py

@@ -352,6 +352,12 @@ def update_calibrations_repository(self) -> None:
         """Update the calibration repository"""
         try:
             repo = git.Repo(CALIBRATION_PATH)
+            print(
+                "If this is the first time using the gitlab calibration files repo, "
+                "you'll be prompted for username and password please enter username "
+                "(required on git-for-windows!) and deploy token - "
+                'see Keeper for this ("Calibrations repository deploy token")'
+            )
             repo.git.pull()
         except git.GitCommandError:
             self.prompt.prompt_and_raise_if_not_yes(