Update app.py

Author: Gurram2001

app/app.py

@@ -5,7 +5,7 @@
 metrics = PrometheusMetrics(app)
 @app.route('/')
 def hello():
-    return "Hello from DevOps on Azure VM with CI/CD!"
+    return "Hello from DevOps on Azure VM with CI/CD! - Done by manikarthik"
 
 if __name__ == '__main__':
     app.run(host='0.0.0.0', port=5000)