Update precommit.yml

Author: jagapiou

.github/workflows/precommit.yml

@@ -62,7 +62,8 @@ jobs:
           brew install python@${{ matrix.python-version }}
           brew unlink python3
           brew link --force python@${{ matrix.python-version }}
-          brew rehash
+          python3 --version
+          alias python3=python${{ matrix.python-version }}
           python3 --version
           brew install python-packaging
           brew install numpy