ci: version bump 3.1.1

Author: Automated Version Bump

pom.xml

@@ -12,7 +12,7 @@
 
     <groupId>edu.stanford.protege</groupId>
     <artifactId>webprotege-backend-api</artifactId>
-    <version>3.1.0</version>
+    <version>3.1.1</version>
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <guava.version>28.0</guava.version>