wolf: fix steam-cache mount missing from configure-apps CATALOG block

The first Python CATALOG (used at initial install time) was missing the
steam-cache mount that the update-apps block had. Both paths now include
the persistent cache mount.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D8ckUJQtj1pH8jtAddBDZs

services/wolf.sh

@@ -1107,7 +1107,8 @@ CATALOG = {
         name='WolfSteam', title='Steam',
         icon='https://games-on-whales.github.io/wildlife/apps/steam/assets/icon.png',
         image='ghcr.io/games-on-whales/steam:edge',
-        mounts=['/etc/localtime:/etc/localtime:ro', '/etc/timezone:/etc/timezone:ro'],
+        mounts=['/etc/localtime:/etc/localtime:ro', '/etc/timezone:/etc/timezone:ro',
+                f'{games}/steam-cache:/home/retro/.cache:rw'],
         env=['PROTON_LOG=1', 'RUN_SWAY=true',
              'GOW_REQUIRED_DEVICES=/dev/input/* /dev/dri/* /dev/nvidia*'],
         cap_add=['SYS_ADMIN', 'SYS_NICE', 'SYS_PTRACE', 'NET_RAW', 'MKNOD', 'NET_ADMIN'],