chore(gradle): bump org.gwtproject:gwt-user from 2.12.1 to 2.12.2

Bumps org.gwtproject:gwt-user from 2.12.1 to 2.12.2.

---
updated-dependencies:
- dependency-name: org.gwtproject:gwt-user
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gradle/libs.versions.toml

@@ -34,7 +34,7 @@ groovy = "3.0.24"
 # Only bump this in concert with boringssl
 grpc = "1.65.1"
 guava = "33.4.0-jre"
-gwt = "2.12.1"
+gwt = "2.12.2"
 # used by GwtTools
 gwtJetty = "9.4.44.v20210927"
 hadoop = "3.4.1"