Update dependency org.domaframework.doma.codegen to v3.1.1 (#266)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ doma = "3.9.0"
 kotlin = "2.2.0"
 junit = "5.13.2"
 spotless = "7.0.4"
-doma-codegen = "3.0.0"
+doma-codegen = "3.1.1"
 doma-compile = "4.0.0"
 h2 = "2.3.232"
 logback = "1.5.18"