Update selection instructions to also mention pushing

Dependencies

• [2] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).

Change contents

• replacement in pijul/src/commands/pushpull.rs at line 313
  [2.121455]→[2.121455:121531](∅→∅)
  − "# Please select the changes to pull. The lines that contain just a
  [2.121455]

  [2.121531]
  + "# Please select the changes to pull/push. The lines that contain just a
• replacement in pijul/src/commands/pushpull.rs at line 315
  [2.121602]→[2.121602:121618](∅→∅)
  − # be pulled.\n"
  [2.121602]

  [2.121618]
  + # be pulled/pushed.\n"