Document the exporter change in CHANGES.md and NEWS.md

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from #20878)

CHANGES.md

@@ -26,6 +26,13 @@ OpenSSL 3.3
 
 ### Changes between 3.2 and 3.3 [xx XXX xxxx]
 
+ * The build of exporters (such as `.pc` files for pkg-config) cleaned up to
+   be less hard coded in the build file templates, and to allow easier
+   addition of more exporters.  With that, an exporter for CMake is also
+   added.
+
+   *Richard Levitte*
+
  * The BLAKE2s hash algorithm matches BLAKE2b's support
    for configurable output length.
 

NEWS.md

@@ -23,7 +23,8 @@ OpenSSL 3.3
 
 ### Major changes between OpenSSL 3.2 and OpenSSL 3.3 [under development]
 
-  * none
+  * Added exporter for CMake on Unix and Windows, alongside the pkg-config
+    exporter.
 
 OpenSSL 3.2
 -----------