Update dependency ch.qos.logback:logback-classic to v1.5.20 (#297)

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

Author: renovate[bot]

build.gradle.kts

@@ -39,7 +39,7 @@ subprojects {
         annotationProcessor("org.seasar.doma:doma-processor:${domaVersion}")
         implementation("org.seasar.doma:doma-core:${domaVersion}")
         implementation("org.seasar.doma:doma-slf4j:${domaVersion}")
-        runtimeOnly("ch.qos.logback:logback-classic:1.5.19")
+        runtimeOnly("ch.qos.logback:logback-classic:1.5.20")
         runtimeOnly("com.h2database:h2:2.4.240")
         testImplementation(platform("org.junit:junit-bom:5.14.0"))
         testImplementation("org.junit.jupiter:junit-jupiter-api")