Update docs.json

Add Opik to docs/docs.json

docs/docs.json

@@ -109,6 +109,7 @@
               "how-to/langtrace-observability",
               "how-to/mlflow-observability",
               "how-to/openlit-observability",
+              "how-to/opik-observability",
               "how-to/portkey-observability"
             ]
           },
@@ -228,4 +229,4 @@
       "reddit": "https://www.reddit.com/r/crewAIInc/"
     }
   }
-}
+}