fixup! [CI][WIP] Test a homebrew-based CI.

Author: hageboeck

.github/workflows/root-ci.yml

@@ -122,10 +122,10 @@ jobs:
             arch: ARM64
             run_on: mac15
             overrides: ["CMAKE_CXX_STANDARD=23"]
-          - platform: mac15
-            arch: ARM64
-            run_on: experimental-brew-ci
-            overrides: ["CMAKE_CXX_STANDARD=23", "tmva-sofie=Off"]
+          #- platform: mac15
+          #  arch: ARM64
+          #  run_on: experimental-brew-ci
+          #  overrides: ["CMAKE_CXX_STANDARD=23", "tmva-sofie=Off"]
           - platform: mac26
             arch: ARM64
             run_on: experimental-brew-ci-2