Disable MacOS test on LTS

This is because the latest MacOS doesn't work with x86, and Julia LTS doesn't
work with MacOS AArch64.
So instead, we test with 1.9 for MacOS.

.github/workflows/UnitTests.yml

@@ -15,13 +15,20 @@ jobs:
           - '1.6' # LTS
           - '1'
         julia-arch: [x86]
-        os: [ubuntu-latest, windows-latest, macOS-latest]
+        os: [ubuntu-latest, windows-latest]
         experimental: [false]
         include:
           - julia-version: nightly
             julia-arch: x86
             os: ubuntu-latest
             experimental: true
+          # MacOS Aarch64 reached Tier1 support of Julia in version 1.9
+          - julia-version: '1.9'
+            os: macOS-latest
+            experimental: false
+          - julia-version: '1'
+            os: macOS-latest
+            experimental: false
 
     steps:
       - name: Checkout Repository