Easy: Update Comment on `ZSTD_initDStream()`

lib/zstd.h

@@ -763,7 +763,7 @@ ZSTDLIB_API size_t ZSTD_freeDStream(ZSTD_DStream* zds);
 
 /* This function is redundant with the advanced API and equivalent to:
  *
- *     ZSTD_DCtx_reset(zds);
+ *     ZSTD_DCtx_reset(zds, ZSTD_reset_session_only);
  *     ZSTD_DCtx_refDDict(zds, NULL);
  */
 ZSTDLIB_API size_t ZSTD_initDStream(ZSTD_DStream* zds);