Support newer hugo versions

[cakekoa]

What does this PR do?

I'm stuck using a newer version of Hugo (v0.123.1) than is mentioned as supported in the docs (v0.92.0). These changes allow the documentation to be compiled with more recent versions of Hugo (tested on v0.123.1 and v0.127.0).

PR Checklist

• [x] Have you added an explanation of what your changes do and why you'd like to include them?
• [ ] Is the TravisCI build passing?
• [ ] Was the CHANGELOG.md updated to reflect the changes?
• [ ] Was the documentation framework updated to reflect the changes?
• [x] Have you checked that you haven't introduced any duplicate code?

Testing Checklist

• [ ] Added relevant unit tests?
• [ ] Do all unit tests pass?
• [ ] Do all end-to-end tests pass?
• [ ] Any other testing performed?

  Tested by {Running the Monkey locally with relevant config/running Island/...}

• [ ] If applicable, add screenshots or log transcripts of the feature working

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 77.06%. Comparing base (925c986) to head (ea5bc55).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #4194 +/- ## ======================================== Coverage 77.06% 77.06% ======================================== Files 442 442 Lines 14126 14126 Branches 18 18 ======================================== Hits 10886 10886 Misses 3240 3240 ```

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