feat: Add sorting list options for secret scanning

[maaarcelino]

Similar to #3477 this adds the missing sorting options from the SecretScanningAlertListOptions struct.

These options are available in the list-secret-scanning-alerts-for-a-repository endpoint and the respective ones for orgs and enterprises.

[maaarcelino]

@gmlewis After this is merged, could you cut another minor release, please? 🙏 I promise this is the last one 😄

[gmlewis]

@gmlewis After this is merged, could you cut another minor release, please? 🙏 I promise this is the last one 😄

Yes, but it will probably be closer to this evening.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.02%. Comparing base (81dc7a9) to head (da5a31a).
Report is 1 commits behind head on master.

Additional details and impacted files

@@ Coverage Diff @@## master #3481 +/- ##
=======================================
Coverage 91.02% 91.02% =======================================
Files 179 179 Lines 15561 15561 =======================================
Hits 14165 14165 Misses 1223 1223 Partials 173 173 

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[gmlewis]

Thank you, @maaarcelino!
LGTM.
Merging.

[gmlewis]

@gmlewis After this is merged, could you cut another minor release, please? 🙏 I promise this is the last one 😄

This is now available here: https://github.com/google/go-github/releases/tag/v69.2.0