update mac ci for modern brew

.github/workflows/mac-ci.yml

@@ -20,15 +20,10 @@ jobs:
         brew install readline || brew upgrade readline
         brew install autoconf || brew upgrade autoconf
         brew install automake || brew upgrade automake
-        sudo mkdir -p /usr/local
-        sudo ln -sf /usr/local/opt/tcl-tk/include /usr/local/include/tcl8.6
-        sudo cp /usr/local/opt/tcl-tk/lib/libtcl* /usr/local/lib
-        sudo ln -sf /usr/local/opt/tcl-tk/bin/tclsh8.6 /usr/local/bin/tclsh
-        sudo ln -sf /usr/local/opt/tcl-tk/bin/tclsh8.6 /usr/local/bin/tclsh8.6
     - name: configure	
       run: |
         autoreconf -vif
-        ./configure --with-readline-includes=/usr/local/Cellar/readline/8.1/include --with-readline-library=/usr/local/Cellar/readline/8.1/lib --with-tcl=/usr/local/opt/tcl-tk/lib --with-tcl-includes=/usr/local/opt/tcl-tk/include
+        ./configure --with-readline-includes=/opt/homebrew/opt/readline/8.1/include --with-readline-library=/opt/homebrew/opt/readline/8.1/lib --with-tcl=/opt/homebrew/opt/tcl-tk/lib --with-tcl-includes=/opt/homebrew/opt/tcl-tk/include
     - name: make
       run: make
     - name: install