fix(deps): update dependency com.github.decentsoftware-eu:decentholograms to v2.8.15

Author: renovate[bot]

pom.xml

@@ -106,7 +106,7 @@
     <dependency>
       <groupId>com.github.decentsoftware-eu</groupId>
       <artifactId>decentholograms</artifactId>
-      <version>2.8.12</version>
+      <version>2.8.15</version>
       <scope>provided</scope>
     </dependency>
     <dependency>