fix doc build warning

Author: t20100

src/hdf5plugin/_filters.py

@@ -951,7 +951,7 @@ class SZ(FilterBase):
 
     For more details about the compressor, see `SZ2 compressor <https://github.com/szcompressor/SZ2>`_.
 
-    .. warning:: The SZ2 compressor is deprecated, see `SZ <https://github.com/szcompressor/SZ?tab=readme-ov-file#deprecatedlegacy-version-sz2>`_
+    .. warning:: The SZ2 compressor is deprecated, see `SZ repository <https://github.com/szcompressor/SZ?tab=readme-ov-file#deprecatedlegacy-version-sz2>`_
     """
 
     filter_name = "sz"