Upgrade immutables to 2.11.1 (#740)

Author: ascopes

pom.xml

@@ -89,7 +89,7 @@
   <properties>
     <!-- Dependencies -->
     <assertj.version>3.27.3</assertj.version>
-    <immutables.version>2.11.0</immutables.version>
+    <immutables.version>2.11.1</immutables.version>
     <javax-annotation.version>1.3.2</javax-annotation.version>
     <jspecify.version>1.0.0</jspecify.version>
     <json.version>20250517</json.version>