Upgrade to Logback 1.5.21.

Closes: #2719

Author: christophstrobl

parent/pom.xml

@@ -121,7 +121,7 @@
 		<junit-pioneer>2.3.0</junit-pioneer>
 		<kotlin>2.2.21</kotlin>
 		<kotlin-coroutines>1.10.2</kotlin-coroutines>
-		<logback>1.5.20</logback>
+		<logback>1.5.21</logback>
 		<microbenchmark>1.0.0</microbenchmark>
 		<micrometer>1.16.0</micrometer>
 		<micrometer-tracing>1.6.0</micrometer-tracing>