Changes

Add release-8.5 branch to presubmit jobs to ensure CI coverage for the new release branch. (#3887)

This PR updates the presubmit job configuration for TiCDC.

The primary reason for this change is to ensure that presubmit tests are
run against the new `release-8.5` branch. This is crucial for
maintaining code quality and stability for this specific release line.

Changes include:

* Added `^release-8\.5$` to the list of branches for which presubmit
tests will be executed.

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Signed-off-by: tenfyzhong <tenfy@tenfy.cn>
 (commit: 086106b)