brew link --overwrite tcl-tk@8 to prevent conflict with GitHub image's version

Author: hugovk

.github/workflows/reusable-macos.yml

@@ -42,7 +42,7 @@ jobs:
       run: |
         brew install pkg-config openssl@3.0 xz gdbm tcl-tk@8 make
         # Because alternate versions are not symlinked into place by default:
-        brew link tcl-tk@8
+        brew link --overwrite tcl-tk@8
     - name: Configure CPython
       run: |
         GDBM_CFLAGS="-I$(brew --prefix gdbm)/include" \