chore(deps): update dependency io_bazel_stardoc to v0.5.6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
io_bazel_stardoc	http_archive	patch	0.5.3 -> 0.5.6

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Release Notes

bazelbuild/stardoc (io_bazel_stardoc)

### [`v0.5.6`](https://togithub.com/bazelbuild/stardoc/blob/HEAD/CHANGELOG.md#Release-056-initially-tagged-as-055) [Compare Source](https://togithub.com/bazelbuild/stardoc/compare/0.5.4...0.5.6) Bugfix release: update `@rules_java` dependency to fix breakage with Bazel at HEAD. **Contributors** Alexandre Rostovtsev ### [`v0.5.4`](https://togithub.com/bazelbuild/stardoc/blob/HEAD/CHANGELOG.md#Release-054) [Compare Source](https://togithub.com/bazelbuild/stardoc/compare/0.5.3...0.5.4) **New Features** - Stardoc supports bzlmod! ([#​141](https://togithub.com/bazelbuild/stardoc/issues/141), special thanks to Fabian Meumertzheim) - Stardoc output files are now exposed in stardoc() target runfiles ([#​139](https://togithub.com/bazelbuild/stardoc/issues/139)) **Contributors** Alexandre Rostovtsev, Fabian Meumertzheim, Greg Estren, Ivo List, Keith Smiley, lberki, Philipp Schrader

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