fix(deps): update dependency org.cactoos:cactoos to v0.56.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.cactoos:cactoos	0.56.0 -> 0.56.1

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Release Notes

yegor256/cactoos (org.cactoos:cactoos)

### [`v0.56.1`](https://redirect.github.com/yegor256/cactoos/releases/tag/0.56.1): a few extra NULL checks would be helpful [Compare Source](https://redirect.github.com/yegor256/cactoos/compare/0.56.0...0.56.1) See [#​1739](https://redirect.github.com/yegor256/cactoos/issues/1739), release log: - [`b1988b8`](https://redirect.github.com/yegor256/cactoos/commit/b1988b88b89f8e2758bd35fc096009baeff2bdf3) by [@​yegor256](https://redirect.github.com/yegor256): [#​1739](https://redirect.github.com/yegor256/cactoos/issues/1739) java9 fix - [`1fdb928`](https://redirect.github.com/yegor256/cactoos/commit/1fdb9286c5a9a4f365154c82832ef4fd0687f5fe) by [@​yegor256](https://redirect.github.com/yegor256): [#​1739](https://redirect.github.com/yegor256/cactoos/issues/1739) more null checks - [`2c9a15e`](https://redirect.github.com/yegor256/cactoos/commit/2c9a15eb723a5a555f60393d82c215becabc1c0b) by [@​yegor256](https://redirect.github.com/yegor256): better error messge - [`af8a4bd`](https://redirect.github.com/yegor256/cactoos/commit/af8a4bd3af83f7cf071409764b2e9a4fb22586c9) by [@​renovate](https://redirect.github.com/renovate)\[bot]: chore(deps): update dependency... - [`32dd85c`](https://redirect.github.com/yegor256/cactoos/commit/32dd85caf3da2eab5cc3cecb2bc6f4fa311eee3d) by [@​yegor256](https://redirect.github.com/yegor256): Merge pull request [#​1737](https://redirect.github.com/yegor256/cactoos/issues/1737) from ... Released by Rultor 2.0-SNAPSHOT, see [build log](https://www.rultor.com/t/44735-2441254466)

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PR-Codex overview

This PR updates the version of the cactoos dependency in the pom.xml file from 0.56.0 to 0.56.1, reflecting a minor version increment.

Detailed summary

• Updated the cactoos dependency version from 0.56.0 to 0.56.1 in the pom.xml file.

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[volodya-lombrozo]

@rultor please, try to merge, since 8 checks have passed

[rultor]

@rultor please, try to merge, since 8 checks have passed

@volodya-lombrozo OK, I'll try to merge now. You can check the progress of the merge here.

[rultor]

@rultor please, try to merge, since 8 checks have passed

@volodya-lombrozo Done! FYI, the full log is here (took me 5min).