Merge pull request #172 from LLFourn/fix-musig-synthetic-doc

[musig] new_with_synthetic_nonces had the wrong docs

schnorr_fun/src/musig.rs

@@ -703,7 +703,7 @@ where
 ///
 /// ```
 /// use schnorr_fun::musig;
-/// let musig = musig::new_with_deterministic_nonces::<sha2::Sha256>();
+/// let musig = musig::new_with_synthetic_nonces::<sha2::Sha256, rand::rngs::ThreadRng>();
 /// ```
 pub fn new_with_synthetic_nonces<H, R>() -> MuSig<H, nonce::Synthetic<H, nonce::GlobalRng<R>>>
 where