Make comment more descriptive

Dependencies

• [2] J4PKMKJX Add root doc comment, gemtext module

Change contents

• replacement in gemini/src/gemtext.rs at line 24
  [2.1242]→[2.1242:1285](∅→∅)
  − /// Link line, with an optional title.
  [2.1242]

  [2.1285]
  + /// Link line, with an optional descriptive name.