update NullAway to 0.13.1

Author: ThoSap

gradle/libs.versions.toml

@@ -19,7 +19,7 @@ checkstyle = "13.0.0"
 datafaker = "2.5.3"
 errorProne = "2.46.0"
 errorPronePlugin = "4.4.0"
-nullAway = "0.13.0"
+nullAway = "0.13.1"
 
 [plugins]
 # https://github.com/allegro/axion-release-plugin