ORC-1499: Add MacOS 13 and 14 to building.md

This PR aims to add MacOS 13 and 14 to `building.md`.

- #1511 added MacOS 13 test coverage .
- I verified MacOS 14 manually on Apple Silicon.

Manual review because this is a doc-only change.

Closes #1606 from dongjoon-hyun/ORC-1499.

Authored-by: Dongjoon Hyun <dongjoon@apache.org>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>
(cherry picked from commit a9e4965)
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>

site/_docs/building.md

@@ -11,7 +11,7 @@ The C++ library is supported on the following operating systems:
 
 * CentOS 7
 * Debian 10 to 11
-* MacOS 11.6 and 12.5
+* MacOS 11.6 and 14.0
 * Ubuntu 18.04 to 22.04
 
 You'll want to install the usual set of developer tools, but at least: