docs(gitlab): add missing env vars to examples

[gotbadger]

Description

While not strictly needed these env vars are required when using cloud if there are issues with resolving them internally in the binary with the use of the git cli command. As such its probably best to add them to all examples to increase the chances that things will work as expected.

Checklist

• I've added test coverage that shows my fix or feature works as expected.
• I've updated or added documentation if required.
• I've included usage information in the description if CLI behavior was updated or added.
• PR title follows Conventional Commits format