message: docs: add changelog for web 2.4.0
diff: # CHANGELOG
  +
  +## Nextclade Web 2.4.1 (2022-08-02)
  +
  +### **Fix (Web)**: reset detected sequence name duplicate when starting new run
  +
  +Nextclade Web 2.4.0 was incorrectly retaining sequence name duplicates info across runs. This is now fixed.
  +
  +
  ## Nextclade CLI 2.4.0, Nextclade Web 2.4.0 (2022-08-02)
  ### **Fix (Web)**: use indices to identify sequences uniquely in Nextclade Web
  