link to lichess-org install wiki rather than pnpm website

ui/build

@@ -6,12 +6,11 @@ cd "$(dirname "${BASH_SOURCE:-$0}")/.build"
 
 update=$(echo "$*" | grep -q -- '--update' && echo true || echo false)
 
-#if $update || [ ! -d "node_modules" ]; then
-  if ! command -v pnpm &> /dev/null; then
-    echo "The 'pnpm' tool is required. See https://pnpm.io/installation."
-    exit 1
-  fi
-  pnpm install --silent --ignore-workspace --no-lockfile
-#fi
+if ! command -v pnpm &> /dev/null; then
+  echo "The 'pnpm' tool is required. See https://github.com/lichess-org/lila/wiki/Lichess-Development-Onboarding#tools-and-dependency-managers"
+  exit 1
+fi
+
+pnpm install --silent --ignore-workspace --no-lockfile
 
 node --experimental-strip-types --no-warnings src/main.ts "$@"