Merge branch '3.1' into 3.x

Fix #1561: build with JDK 21 to get Javadocs (#1595)

Fix #1593: add `JsonGenerator.writeComment()` (#1594)

Merge branch '3.x' of github.com:FasterXML/jackson-core into 3.x

Merge branch '3.1' into 3.x

Fix #1589: javadoc improvement for JacksonException (#1592)

Bump the github-actions group with 5 updates (#1585)

Add CI version updater for README (#1587)

Merge branch '3.1' into 3.x

Fix dep version

Simplify CI wrt code coverage calculation (#1584)

Merge branch '3.1' into 3.x

Post-release dep version bump

[maven-release-plugin] prepare for next development iteration

[maven-release-plugin] prepare release jackson-core-3.1.1