fix(deps): update revision to v3.1.1 (#2610)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pom.xml

@@ -26,7 +26,7 @@
     <description>Spring Boot Admin</description>
     <url>https://github.com/codecentric/spring-boot-admin/</url>
     <properties>
-        <revision>3.1.1-SNAPSHOT</revision>
+        <revision>3.1.1</revision>
         <java.version>17</java.version>
 
         <maven.compiler.source>${java.version}</maven.compiler.source>