chore(deps): bump spotless-plugin-gradle from 6.9.0 to 6.9.1

[dependabot[bot]]

Bumps spotless-plugin-gradle from 6.9.0 to 6.9.1.

Commits

• ece76dd Published gradle/6.9.1
• bde7eb3 Published lib/2.28.1
• 06f06ef Bump diktat-rules from 1.2.1 to 1.2.3 (#1266)
• ba7d618 Bump default diktat version 1.2.1 -> 1.2.3
• dbb207a Bump changelogs.
• b1abdfa Merge branch 'main' into dependabot/gradle/org.cqfn.diktat-diktat-rules-1.2.3
• bcfec8f Fix clang formatter (#1268 fixes #1267)
• 89b4692 Fix changelog links.
• 05c4336 Fix changelog categories.
• a443887 Merge branch 'main' into main
• Additional commits viewable in compare view

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