chore: minor correction

Author: samrose

Diff for: ansible/tasks/setup-wal-g.yml

@@ -89,7 +89,7 @@
 - name: Install wal-g from nix binary cache
   become: yes
   shell: |
-    sudo -u wal-g bash -c ". /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh && nix profile install github:supabase/postgres/{{ git_commit_sha }}#{{psql_version}}/bin"
+    sudo -u wal-g bash -c ". /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh && nix profile install github:supabase/postgres/{{ git_commit_sha }}#wal-g"
   when: stage2_nix
 
 - name: Create symlink for wal-g from Nix profile to /usr/local/bin