update changelogs

Author: tstanmay13

fern/products/sdks/overview/java/changelog/2025-11-04.mdx

@@ -1,3 +1,7 @@
+## 3.11.7
+**`(fix):`** Fix ApiError toString() to display JSON-serialized body instead of hashcode (e.g., `{"title": "Bad Request", ...}` instead of `BadRequestProblems@4ac5ea99`).
+
+
 ## 3.11.6
 **`(fix):`** Fix path parameter prefixes (e.g., v{version}) being split into separate segments, producing URLs like .../v/1 instead of .../v1.