s/RuntimeError/ValueError/

Author: emmatyping

Doc/library/compression.zstd.rst

@@ -258,7 +258,7 @@ Compressing and decompressing data in memory
       at higher compression levels.
 
       If :attr:`last_mode` is not :attr:`FLUSH_FRAME`, a
-      :exc:`RuntimeError` is raised as the compressor is not at the start of
+      :exc:`ValueError` is raised as the compressor is not at the start of
       a frame. If the pledged size does not match the actual size of data
       provided to :meth:`~.compress`, future calls to :meth:`~.compress` or
       :meth:`flush` may raise :exc:`ZstdError` and the last chunk of data may