Update spec/std/isa/csr/V/vxsat.yaml

Co-authored-by: Paul Clarke <[email protected]>
Signed-off-by: Jennifer Dupaquier <[email protected]>

Author: jmawet

spec/std/isa/csr/V/vxsat.yaml

@@ -26,6 +26,6 @@ fields:
 
       The vxsat bit is mirrored in vcsr.
     sw_write(csr_value): |
-      return csr_value.VALUE & (VLEN - 1);
+      return csr_value.VALUE & 1;
     type: RW-H
     reset_value: UNDEFINED_LEGAL