fix: keep &mut self

src/whisper_ctx_wrapper.rs

@@ -448,7 +448,7 @@ impl WhisperContext {
     ///
     /// # C++ equivalent
     /// `bool whisper_full_get_segment_speaker_turn_next(struct whisper_context * ctx, int i_segment)`
-    pub fn full_get_segment_speaker_turn_next(&self, i_segment: c_int) -> bool {
+    pub fn full_get_segment_speaker_turn_next(&mut self, i_segment: c_int) -> bool {
         self.ctx.full_get_segment_speaker_turn_next(i_segment)
     }