remove pnpm verson lock during ci build

.gitea/workflows/deploy.yaml

@@ -27,6 +27,7 @@ jobs:
         run: |
           if [ -f "package.json" ]; then
             # Force pnpm to use the version baked into our Nix image
+            sed -i '/"packageManager":/d' package.json
             pnpm config set manage-package-manager false
             pnpm install --no-frozen-lockfile
           fi