DOC: fixed CFS docs - PGPRO-915

Author: Liudmila Mantrova

doc/src/sgml/cfs.sgml

@@ -150,10 +150,9 @@
   </para>
 
   <para>
-    CFS can be build with several compression libraries: &productname; lz, zlib, lz4, snappy, lzfse...
-    But this is build time choice: it is not possible now to dynamically choose compression algorithm.
-    CFS stores information about the compression algorithm used in a tablespace and produces error if &productname; is built with different
-    library.
+    By default, CFS uses <literal>zstd</literal> compression library.
+    To enhance security, CFS checks that the compression algorithm used
+    in a tablespace corresponds to this library.
   </para>
 
   <para>