fix: newline in the middle of the link removed

It seems that Docusaurus does not support it

Signed-off-by: Miguel Fernández <mikeloguay@gmail.com>

docs/backend-system/architecture/01-index.md

@@ -56,8 +56,7 @@ Just like plugins, modules also have access to services and can depend on their
 ## Package structure
 
 A detailed explanation of the package architecture can be found in the
-[Backstage Architecture
-Overview](../../overview/architecture-overview/#package-architecture). The
+[Backstage Architecture Overview](../../overview/architecture-overview/#package-architecture). The
 most important packages to consider for this system are the following:
 
 - `plugin-<pluginId>-backend` houses the implementation of the backend plugins