chore: bump anthropic dep version to 2.15.0

PiperOrigin-RevId: 878368486

Author: tilgalas

pom.xml

@@ -69,7 +69,7 @@
     <reactor-core.version>3.7.0</reactor-core.version>
     <wiremock.version>2.35.1</wiremock.version>
     <assertj.version>3.27.7</assertj.version>
-    <anthropic.version>1.4.0</anthropic.version>
+    <anthropic.version>2.15.0</anthropic.version>
     <maven-plugin-tools.version>3.9.0</maven-plugin-tools.version>
     <httpclient5.version>5.6</httpclient5.version>
   </properties>