add step to install boot lib

.github/workflows/build-commit.yml

@@ -163,6 +163,24 @@ jobs:
         with:
           submodules: true
 
+      - name: Install boost
+        uses: MarkusJx/install-boost@v2.4.1
+        id: install-boost
+        with:
+            # REQUIRED: Specify the required boost version
+            # A list of supported versions can be found here:
+            # https://github.com/MarkusJx/prebuilt-boost/blob/main/versions-manifest.json
+            boost_version: 1.73.0
+            # OPTIONAL: Specify a custon install location
+            boost_install_dir: C:\boost
+            # OPTIONAL: Specify a platform version
+            platform_version: 2019
+            # OPTIONAL: Specify a toolset
+            toolset: msvc
+      
+            # NOTE: If a boost version matching all requirements cannot be found,
+            # this build step will fail
+            
       - name: Download OpenBLAS
         id: get_openblas
         if: ${{ matrix.build == 'openblas' }}
@@ -178,6 +196,8 @@ jobs:
 
       - name: Build
         id: cmake_build
+        env:
+          BOOST_ROOT: ${{ steps.install-boost.outputs.BOOST_ROOT }}
         run: |
           cd ${{github.workspace}}/ggml
           mkdir build