Trim the word-list source note to drop the third-party project reference
The French list's `source` metadata (and the generator's header comment)
disclaimed any relation to another word-game project by naming it. The
name adds nothing and is better left out; keep only the positive
"Independently sourced." statement.
Updated the generator and the committed words.fr.json together so the
reproducible build still matches the shipped file. Only the `source`
string changed — answers, encoding, and counts are untouched.