fix(package.json): correct setup-linux script activation command

Author: saifsweelam

apps/recommendation-api/package.json

@@ -5,7 +5,7 @@
   "main": "index.js",
   "scripts": {
     "setup-windows": "python -m venv .venv && .venv\\Scripts\\activate && pip install -r requirements.txt",
-    "setup-linux": "python3 -m venv .venv && source .venv/bin/activate && pip install -r requirements.txt",
+    "setup-linux": "python3 -m venv .venv && . .venv/bin/activate && pip install -r requirements.txt",
     "lint": "node bin/lint.js",
     "dev": "node bin/dev.js"
   },