fix(rnsdk) copying sounds on iOS

Fixes: #13705

react-native-sdk/jitsi-meet-rnsdk.podspec

   s.script_phase = {
       :name => 'Copy Sound Files',
       :script => '
-          SOURCE_PATH="${PODS_TARGET_SRCROOT}/sounds"
-          TARGET_PATH="$(dirname ${CONFIGURATION_BUILD_DIR})"
-          PROJECT_NAME=$(basename $(dirname $(dirname ${PROJECT_DIR}))).app
-          cp -R "${PODS_TARGET_SRCROOT}/sounds/" "${TARGET_PATH}/${PROJECT_NAME}"
+          SOURCE_PATH="${PODS_TARGET_SRCROOT}/sounds/"
+          TARGET_PATH=$(dirname "${CONFIGURATION_BUILD_DIR}")
+          PROJECT_NAME=$(basename $(dirname $(dirname "${PROJECT_DIR}"))).app
+          cp -R "${SOURCE_PATH}" "${TARGET_PATH}/${PROJECT_NAME}"
       ',
   }
 end