chore: improve changeset description with 3.0.71 fix detail

Author: kilo-code-bot[bot]

.changeset/update-anthropic-sdk-3071.md

@@ -3,4 +3,4 @@
 "@kilocode/kilo-gateway": patch
 ---
 
-Update `@ai-sdk/anthropic` to 3.0.71, which adds `xhigh` effort support for Opus 4.7 adaptive thinking
+Update `@ai-sdk/anthropic` to 3.0.71, adding `xhigh` effort for Opus 4.7 adaptive thinking (3.0.70) and fixing fine-grained tool streaming beta header for Opus 4.7 (3.0.71)