Update bazel skylib version

[nycrat]

Description

Resolves the following warning which is displayed with every bazel command:

WARNING: For repository 'bazel_skylib', the root module requires module version bazel_skylib@1.7.1, but got bazel_skylib@1.8.1 in the resolved dependency graph. Please update the version in your MODULE.bazel or set --check_direct_dependencies=off
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Testing Done

bazel_skylib just provides helper rules for bazel BUILD files. I'm just assuming if robot software builds then this change should not break anything else

Resolved Issues

Length Justification and Key Files to Review

Review Checklist

It is the reviewers responsibility to also make sure every item here has been covered

• Function & Class comments: All function definitions (usually in the .h file) should have a javadoc style comment at the start of them. For examples, see the functions defined in thunderbots/software/geom. Similarly, all classes should have an associated Javadoc comment explaining the purpose of the class.
• Remove all commented out code
• Remove extra print statements: for example, those just used for testing
• Resolve all TODO's: All TODO (or similar) statements should either be completed or associated with a github issue