Bump org.embulk:embulk-util-timestamp from 0.3.0 to 0.3.1

Bumps [org.embulk:embulk-util-timestamp](https://github.com/embulk/embulk-util-timestamp) from 0.3.0 to 0.3.1.
- [Commits](embulk/embulk-util-timestamp@v0.3.0...v0.3.1)

---
updated-dependencies:
- dependency-name: org.embulk:embulk-util-timestamp
  dependency-version: 0.3.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -13,7 +13,7 @@ validation-api = "2.0.1.Final"
 # We choose Jackson with the latest patch release of the latest open branch.
 jackson = "2.16.2"
 
-embulk-util-timestamp = "0.3.0"
+embulk-util-timestamp = "0.3.1"
 
 checkstyle = "9.3"