Upgrade NullAway 0.12.2 -> 0.12.3 (#1502)

See:
- https://github.com/uber/NullAway/blob/master/CHANGELOG.md
- https://github.com/uber/NullAway/releases/tag/v0.12.3
- uber/NullAway@v0.12.2...v0.12.3

pom.xml

@@ -218,7 +218,7 @@
         <version.maven>3.9.9</version.maven>
         <version.mockito>5.15.2</version.mockito>
         <version.nopen-checker>1.0.1</version.nopen-checker>
-        <version.nullaway>0.12.2</version.nullaway>
+        <version.nullaway>0.12.3</version.nullaway>
         <version.pitest-git>1.1.4</version.pitest-git>
         <version.rewrite-templating>1.20.2</version.rewrite-templating>
         <version.surefire>3.2.3</version.surefire>