Exclude slf4j 2.0+ from upgrades

Author: acogoluegnes

.github/dependabot.yml

@@ -11,8 +11,10 @@ updates:
       - dependency-name: "com.swiftmq:swiftmq-client"
       - dependency-name: "org.springframework.boot:spring-boot-maven-plugin"
         versions: ["[2.7,)"]
+      - dependency-name: "org.slf4j:slf4j-api"
+        versions: [ "[2.0,)" ]
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
       interval: "daily"
-    target-branch: "main"
+    target-branch: "main"