CI: Install texinfo on macOS.

Binutils 2.41 requires a version newer than what is provided by macOS.

Author: FtZPetruska

.github/workflows/build.yml

@@ -40,11 +40,10 @@ jobs:
       run: |
         git config --global user.email "builds@travis-ci.com"
         git config --global user.name "Travis CI"
-        brew install autoconf automake libtool
-        mkdir build
-        cd build
-        cmake ..
-        make -j$(nproc) tarball
+        brew install autoconf automake libtool texinfo
+        export PATH="$(brew --prefix texinfo)/bin:$PATH"
+        cmake -S . -B build -G "Unix Makefiles"
+        cmake --build build --target tarball
     - name: Upload artifacts
       if: ${{ success() }}
       uses: actions/upload-artifact@v3