adjust expected slf4j-api version to actual one (#1187)

This has again been overlooked, when upgrading the dependency.
Unfortunately, still nobody found the time to add an automated check for
this to prevent this problem in the future.

buildSrc/src/main/resources/release_check/archunit.pom

@@ -50,7 +50,7 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>2.0.7</version>
+            <version>2.0.9</version>
             <scope>compile</scope>
         </dependency>
     </dependencies>