Use prefix to find boost cmake configuration.

Author: kinyoklion

.github/actions/install-boost/action.yml

@@ -33,6 +33,7 @@ runs:
       run: |
         choco install boost-msvc-14.3 --version 1.87.0 -y --no-progress
         echo "BOOST_ROOT=C:\local\boost_1_87_0" >> $GITHUB_OUTPUT
+        echo "CMAKE_PREFIX_PATH=C:\local\boost_1_87_0\lib64-msvc-14.3\cmake\Boost-1.87.0" >> $GITHUB_OUTPUT
 
     - name: Install boost using homebrew
       id: brew-action

.github/workflows/hello-apps.yml

@@ -34,7 +34,9 @@ jobs:
         run: ./scripts/run-hello-apps.sh static hello-c-client hello-cpp-client hello-c-server hello-cpp-server
         env:
           BOOST_ROOT: ${{ steps.install-boost.outputs.BOOST_ROOT }}
+          CMAKE_PREFIX_PATH: ${{ steps.install-boost.outputs.CMAKE_PREFIX_PATH }}
           OPENSSL_ROOT_DIR: ${{ steps.install-openssl.outputs.OPENSSL_ROOT_DIR }}
+
       - name: Dynamically Linked Hello Apps (C API only)
         shell: bash
         continue-on-error: true # TODO(SC-223804)