GH-2395 - Update to Logback 1.5.21.

Author: odrotbohm

pom.xml

@@ -74,7 +74,7 @@
 		<spring-asciidoctor-backends.version>0.0.7</spring-asciidoctor-backends.version>
 		<errorprone.version>2.36.0</errorprone.version>
 		<evo.version>1.3</evo.version>
-		<logback.version>1.5.20</logback.version>
+		<logback.version>1.5.21</logback.version>
 		<jacoco>0.8.12</jacoco>
 		<jacoco.destfile>${project.build.directory}/jacoco.exec</jacoco.destfile>
 		<jackson-bom.version>3.0.2</jackson-bom.version>