Bump themes/techdoc from 56dca59 to 595a948

Bumps [themes/techdoc](https://github.com/thingsym/hugo-theme-techdoc) from `56dca59` to `595a948`.
- [Release notes](https://github.com/thingsym/hugo-theme-techdoc/releases)
- [Commits](thingsym/hugo-theme-techdoc@56dca59...595a948)

---
updated-dependencies:
- dependency-name: themes/techdoc
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>