chore: update scripts/update-cocoa.sh to 8.4.0

Author: web-flow

RNSentry.podspec

@@ -19,7 +19,7 @@ Pod::Spec.new do |s|
   s.preserve_paths = '*.js'
 
   s.dependency 'React-Core'
-  s.dependency 'Sentry/HybridSDK', '8.3.3'
+  s.dependency 'Sentry/HybridSDK', '8.4.0'
 
   s.source_files = 'ios/**/*.{h,mm}'
   s.public_header_files = 'ios/RNSentry.h'