Travel sample guide links to wrong repo branch

From the backend travel sample guides (e.g. https://developer.couchbase.com/documentation/server/current/sdk/go/sample-app-backend.html) there are links to the repositories on Github. Depending on language these repos have a 5.0 (or similar) branch but the docs link to a version that is only compatible with 4.5, even if you go from the 5.x pages. I think that this is linked to issue DOC-3545.

Golang - links to master (4.5), there's a 5.0 branch but it isn't mentioned anywhere.

Nodejs - links to master (4.5), there's a 5.0 branch but it isn't mentioned anywhere.

Python - links to master (4.5), there's a 5.0 branch but it isn't mentioned anywhere.

Java - links to master (4.5), there's a 5.0 branch which is detailed in the README.

.NET - links to master (5.0), unsure if there's a 4.5 version?

PHP - details how to checkout the 5.0 version in the travel sample guide.