Fix typo

Dependencies

• [2] JS6JZ7IA Add an initial planned feature list for `gemini`
• [3] L6GZJGTU Add READMEs

Change contents

• replacement in gemini/README.md at line 6
  [2.78]→[2.78:98](∅→∅)
  − ## planned fetaures
  [2.78]

  [2.98]
  + ## planned features