build(deps): bump subversion from 2.14.3 to 2.15.1

Created by: dependabot[bot]

Bumps subversion from 2.14.3 to 2.15.1.

Release notes

Sourced from subversion's releases.

2.15.0

🚀 New features and improvements

• JENKINS-66777 - Add SubversionSCMSource repository browser support (#263) @​didiez
• JENKINS-41850 - Add SubversionSCMSource workspaceUpdater support (#265) @​didiez

📝 Documentation updates

• JENKINS-65132 - Fix example script for notifyCommit in README.md (#253) @​mhuijgen

👻 Maintenance

• Stop using deprecated Util#join (#261) @​basil
• Simplify tests with "config round-trip" pattern (#264) @​didiez

2.14.5

🐛 Bug fixes

• JENKINS-38204 - Fixes repeated same "Tag this build" links added to builds (also JENKINS-35176). (#262) @​didiez

👻 Maintenance

• Stop setting useAntClassLoader which nothing consumes (#260) @​basil

2.14.4

🚀 New features and improvements

• Remove Digester dep (#259) @​jglick

Commits

• 64fa2ea [maven-release-plugin] prepare release subversion-2.15.1
• 7d1525e [SECURITY-2506]
• e05d039 [maven-release-plugin] prepare for next development iteration
• 5cb3cdf [maven-release-plugin] prepare release subversion-2.15.0
• 8855d51 Merge pull request #265 from didiez/scmsource-workspaceUpdater-support
• 868f203 Merge branch 'jenkinsci:master' into scmsource-workspaceUpdater-support
• 9aac4a4 Merge pull request #264 from didiez/config-form-roundtrip-tests
• abbfc6f Use Collections.singletonList instead of List.of (JDK9+)
• 087e7fe Replace manual htmlunit form submitUse with JenkinsRule.configRoundtrip(job)
• 6dcba65 Fix imports and replace List.of (JDK9+) with Collections.singletonList
• Additional commits viewable in compare view

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