React Native 0.69-rc2,4 - hermes-engine.podspec

[leotm]

• Fix downloading prebuilt hermes from the Github release facebook/react-native#33935

[leotm]

• patch
• wait for new nightly (last yday)
• wait for rc5

[leotm]

• patch successful
• fixed in 0.69-rc5
  • Fix downloading prebuilt hermes from the Github release facebook/react-native#33935
  • Lazily query for git branch & remote facebook/react-native#33936