Update org.seasar.doma:doma to v3.1.0

Author: renovate[bot]

codegen-test/gradle.properties

@@ -1,2 +1,2 @@
-domaVersion=3.0.1
+domaVersion=3.1.0
 h2Version=2.3.232

codegen/build.gradle.kts

@@ -51,7 +51,7 @@ repositories {
 
 dependencies {
     implementation("org.freemarker:freemarker:2.3.33")
-    testImplementation("org.seasar.doma:doma-core:3.0.1")
+    testImplementation("org.seasar.doma:doma-core:3.1.0")
     testImplementation("org.junit.jupiter:junit-jupiter-api:5.11.3")
     testImplementation("org.junit.jupiter:junit-jupiter-params:5.11.3")
     testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.11.3")