chore(ios): Bump iOS binary size limit from 1470 to 1550 KiB

The RN 0.80 to 0.85 upgrade increased the Sentry-vs-plain iOS binary
size diff from ~1.44 MiB to ~1.51 MiB.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: antonis

performance-tests/metrics-ios.yml

@@ -11,4 +11,4 @@ startupTimeTest:
 
 binarySizeTest:
   diffMin: 600 KiB
-  diffMax: 1470 KiB
+  diffMax: 1550 KiB