fix: do not bundle .md files in cocoapods deployments

Fixes: https://linear.app/customerio/issue/MBL-180/[bug]-resolve-md-file-causing-compilation-issues-for-ios-customers

Customers experience compilation errors in their iOS/RN/Flutter/Expo apps due to customer's apps trying to parse .md files that are bundled with our SDK in production releases.

The issue is resolved by an update to the native iOS SDK cocoapods files. This change points to the latest cocoapods release to use these changes.

commit-id:a6f2ba6a

package.json

@@ -8,7 +8,7 @@
   "react-native": "src/index",
   "source": "src/index",
   "expoVersion": "",
-  "cioNativeiOSSdkVersion": "= 2.12.3",
+  "cioNativeiOSSdkVersion": "= 2.12.5",
   "files": [
     "src",
     "lib",