Update renovate for JRuby 10.1

[bastelfreak]

Validated the config:

$ podman run -it --rm -v $PWD:/data:Z --entrypoint renovate-config-validator ghcr.io/voxpupuli/renovate:latest
 INFO: Validating renovate.jsonc
 INFO: Config validated successfully against 1 file(s)

Short description

Checklist

I have:

• read the CONTRIBUTING.md document
• read and accepted the Developer Certificate of Origin document and added a Signed-off-by annotation to each of my commits
• read and accepted the AI Policy document and added Generated-by or Assisted-by annotations to each of my commits created with the help of an AI agent
• tested this code
• included documentation (including possible behaviour changes)
• documented the code
• added or modified regression test(s)
• added or modified unit test(s)

[Copilot]

Pull request overview

Updates the Renovate configuration to support the JRuby 10.1 series on main while keeping JRuby version caps appropriate for the 6.x and 5.x maintenance branches.

Changes:

• Expand baseBranchPatterns to include the 6.x branch pattern.
• Add a dedicated JRuby package rule for main to allow <10.2 (i.e., JRuby 10.1 series).
• Tighten branch-specific JRuby rules by scoping 6.x/5.x via matchBaseBranches arrays.

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.