Add palindrome check function in C++ basics

Author: ohhpeejoshi

public/data/cpp.json

@@ -81,7 +81,7 @@
           "}"
         ],
         "tags": ["cpp", "string", "palindrome", "utility"],
-        "author": "Arpit-Joshi"
+        "author": "ohhpeejoshi"
       }
     ]
   }