ci(release): drop x86_64-apple-darwin, support aarch64 (Apple Silicon) only

macos-13 (Intel runner) is not available in this plan.
Modern Macs (2020+) are all Apple Silicon — aarch64-apple-darwin
covers all currently supported hardware.

Author: ajainvivek

.github/workflows/release.yml

@@ -26,9 +26,6 @@ jobs:
             os: ubuntu-latest
             archive: tar.gz
             cross: true
-          - target: x86_64-apple-darwin
-            os: macos-13
-            archive: tar.gz
           - target: aarch64-apple-darwin
             os: macos-latest
             archive: tar.gz