chore(deps): update code.forgejo.org/forgejo/runner docker tag to v12.6.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
code.forgejo.org/forgejo/runner (source)	docker	patch	12.6.2 → 12.6.3

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Release Notes

forgejo/runner (code.forgejo.org/forgejo/runner)

v12.6.3

Compare Source

• User guide
• Administrator guide
• Container images

Release Notes

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• features
  • PR: feat: use node:lts instead of node:20-bullseye as default docker label
• bug fixes
  • PR: fix: revert switch from lxc-attach to nsenter
• other
  • PR: Update dependency forgejo/runner to v12.6.2
  • PR: Update https://data.forgejo.org/actions/setup-forgejo action to v3.1.3
  • PR: Update data.forgejo.org/forgejo/runner Docker tag to v12.6.2

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