message: Update snap include path instruction
diff: @@ -10,7 +10,7 @@ description: |
  projects using flatbuffers, however, for the compilation to work, you have
  to manually add the following path in your project's configuration:
  - /snap/flatc/current/include
  + /snap/flatbuffers/current/include
  If you need to use flatbuffers headers from a location other than the above
  path, it is recommended to not use this snap as that could cause a mismatch.
  