`gh aw upgrade` fails on WSL because it can't update itself while running

[dsyme]

dsyme@DSYME-LAPDOG:~/fv-squad$ gh aw upgrade
ℹ Checking gh-aw extension version...
ℹ Upgrading gh-aw extension from v0.61.1 to v0.62.0...
[aw]: failed to download asset linux-amd64: open /home/dsyme/.local/share/gh/extensions/gh-aw/gh-aw: text file busy
X Failed upgrading extension aw: some extensions failed to upgrade
✗ failed to upgrade gh-aw extension
  exit status 1

Works with gh extension upgrade:

dsyme@DSYME-LAPDOG:~/fv-squad$ gh extension upgrade gh-aw
[aw]: upgraded from v0.61.1 to v0.62.0
✓ Successfully checked extension upgrades