changes.src: we managed to implement a few %pragmas before 2.13...

Minor change to the release notes for 2.13: we did end up with a few
actually implemented %pragmas.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/doc/changes.src b/doc/changes.src
index 9422df6..84d6d70 100644
--- a/doc/changes.src
+++ b/doc/changes.src
@@ -83,9 +83,7 @@
    included in a shipping product; it is included for completeness
    only.
 
-\b Add the \c{%pragma} preprocessor directive for forward
-   compatibility with future versions of NASM.  At this time no pragmas
-   are implemented and this is merely a dummy directive.
+\b Add the \c{%pragma} preprocessor directive for soft-error directives.
 
 \b Add the \c{RDPID} instruction.