Forcing usage of boost v1.85 in "windows-2019" runner of github actions.

.github/workflows/actions_build.yml

@@ -556,9 +556,10 @@ jobs:
         QT_VER: ${{matrix.qt_ver == '5' && '5.15.3' || '6.2.2'}}     
 
     - name: Install Boost
+      if: matrix.arch == 'x64'
       shell: cmd
       run: |
-        choco install boost-msvc-14.2           
+        choco install boost-msvc-14.2 --version=1.85.0        
 
     - name: Prepare externals
       shell: cmd
@@ -587,10 +588,11 @@ jobs:
           -DCMAKE_POLICY_DEFAULT_CMP0167=OLD -DBoost_USE_STATIC_LIBS=ON ^
           -DCMAKE_CXX_STANDARD=${{matrix.cpp}} -DUBLOX_TOOLS_QT_VER=${{matrix.qt_ver}} ^
           -DUBLOX_GEN_PROTOCOL=ON -DUBLOX_GEN_TEST=ON -DUBLOX_GEN_TOOLS=ON -DUBLOX_BUILD_TOOLS=${{env.BUILD_TOOLS}} ^
-          -DUBLOX_BUILD_EXAMPLES=ON ^
+          -DUBLOX_BUILD_EXAMPLES=${{env.HAS_BOOST}} ^
           -DUBLOX_SCHEMA_FILES_LIST_FILE=%GITHUB_WORKSPACE%/basic_msgs.txt
       env:
         BUILD_TOOLS: "${{ matrix.cpp >= 17 && matrix.arch == 'x64'  && 'ON' || 'OFF' }}"
+        HAS_BOOST: "${{ matrix.arch == 'x64' && 'ON' || 'OFF' }}"          
 
     - name: Build Target 
       working-directory: ${{runner.workspace}}/build