Update sonar-3d-15-api.md

fix link to swagger.json viewer

Author: tholok97

docs/sonar-3d/sonar-3d-15-api.md

@@ -181,7 +181,7 @@ Refer to the full protocol specification and `.proto` file shown above for more
 
 ## HTTP API
 
-The Sonar 3D-15 exposes a HTTP API for configuration and inspection of system state. The HTTP API is exposed on port 80 and uses paths rooted at `/api/v1/integration/`. JSON is used for request and response bodies. The HTTP API is documented with a [swagger.json](./sonar-3d-15-api-swagger/swagger.json) file. This file can be opened in a compatible viewer such as [this one](https://petstore.swagger.io/?url=https://docs.waterlinked.com/sonar-3d/sonar-3d-15-api/sonar-3d-15-api-swagger/swagger.json). Example code using the HTTP API exists on [github](https://github.com/waterlinked/Sonar-3D-15-api-example).
+The Sonar 3D-15 exposes a HTTP API for configuration and inspection of system state. The HTTP API is exposed on port 80 and uses paths rooted at `/api/v1/integration/`. JSON is used for request and response bodies. The HTTP API is documented with a [swagger.json](./sonar-3d-15-api-swagger/swagger.json) file. This file can be opened in a compatible viewer such as [this one](https://petstore.swagger.io/?url=https://docs.waterlinked.com/sonar-3d/sonar-3d-15-api-swagger/swagger.json). Example code using the HTTP API exists on [github](https://github.com/waterlinked/Sonar-3D-15-api-example).
 
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