doc: update macOS version used to build releases

Refs: nodejs/build#4083
PR-URL: #60080
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Richard Lau <richard.lau@ibm.com>
Reviewed-By: Ulises Gascón <ulisesgascongonzalez@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: targos

BUILDING.md

@@ -166,8 +166,8 @@ Binaries at <https://nodejs.org/download/release/> are produced on:
 | Binary package          | Platform and Toolchain                                        |
 | ----------------------- | ------------------------------------------------------------- |
 | aix-ppc64               | AIX 7.2 TL04 on PPC64BE with GCC 12[^5]                       |
-| darwin-x64              | macOS 13, Xcode 16 with -mmacosx-version-min=13.5             |
-| darwin-arm64 (and .pkg) | macOS 13 (arm64), Xcode 16 with -mmacosx-version-min=13.5     |
+| darwin-x64              | macOS 15, Xcode 16 with -mmacosx-version-min=13.5             |
+| darwin-arm64 (and .pkg) | macOS 15 (arm64), Xcode 16 with -mmacosx-version-min=13.5     |
 | linux-arm64             | RHEL 8 with Clang 19.1 and gcc-toolset-14-libatomic-devel[^6] |
 | linux-ppc64le           | RHEL 8 with Clang 19.1 and gcc-toolset-14-libatomic-devel[^6] |
 | linux-s390x             | RHEL 8 with Clang 19.1 and gcc-toolset-14-libatomic-devel[^6] |