Bump isomorphic-git from 1.36.3 to 1.38.3

Bumps [isomorphic-git](https://github.com/isomorphic-git/isomorphic-git) from 1.36.3 to 1.38.3.
- [Release notes](https://github.com/isomorphic-git/isomorphic-git/releases)
- [Commits](isomorphic-git/isomorphic-git@v1.36.3...v1.38.3)

---
updated-dependencies:
- dependency-name: isomorphic-git
  dependency-version: 1.38.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]