docs: SDK for Go is actually for Node, fix this typo
Closes
* [Running Hydra in production](how-to/production.md)
* [SDKs](sdk.md)
* [SDK for Go](sdk/go.md)
- * [SDK for Go](sdk/js.md)
+ * [SDK for JavaScript](sdk/js.md)
* [Other languages](sdk.md)
* [Contribute](contribute.md)
* [FAQ](faq.md)
