Do not upgrade Logback after 1.2.x

It's not compatible with SLF4J 1.7.x and it is just
used as a test dependency in the project.

Author: acogoluegnes

.github/dependabot.yml

@@ -9,10 +9,10 @@ updates:
     open-pull-requests-limit: 20
     ignore:
       - 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,)" ]
+      - dependency-name: "ch.qos.logback:logback-classic"
+        versions: [ "[1.3,)" ]
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:

pom.xml

@@ -73,7 +73,6 @@
     <micrometer-docs-generator.version>1.0.2</micrometer-docs-generator.version>
     <maven.compiler.plugin.version>3.12.1</maven.compiler.plugin.version>
     <maven-surefire-plugin.version>3.2.5</maven-surefire-plugin.version>
-    <spring-boot-maven-plugin.version>2.7.6</spring-boot-maven-plugin.version>
     <checksum.maven.plugin.version>1.11</checksum.maven.plugin.version>
     <maven.gpg.plugin.version>3.1.0</maven.gpg.plugin.version>
     <buildnumber.plugin.version>3.2.0</buildnumber.plugin.version>