iox-#2390 Fixes typo

doc/website/concepts/architecture.md

@@ -38,7 +38,7 @@ protocol, which is used by `iceoryx_posh` to connect and discover `popo::Publish
 * `version`: The namespace version contains ABI compatibilities checks.
 * `build`: The namespace build contains certain maximium values which can be changed before compilation.
 
-#### Gatway library
+#### Gateway library
 
 * The gateway library and its namespace `gw` contain generic abstractions to create a gateway. They are used by [`iceoryx_dds`](https://github.com/eclipse-iceoryx/iceoryx-gateway-dds).