fix boost version for windows

.gitea/workflows/build.yaml

@@ -114,6 +114,12 @@ jobs:
           git config --global url."https://github.com/".insteadOf "git@github.com:"
           git submodule update --init --recursive
 
+      - name: Patch Boost Requirement
+        run: |
+          echo "Downgrading Boost requirement from 1.70 to 1.69..."
+          # Fix the root CMakeLists.txt which asks for 1.70
+          sed -i 's/find_package(Boost 1.70/find_package(Boost 1.69/g' CMakeLists.txt
+
       - name: Build Windows Dependencies
         run: |
           # 1. Enter the submodule directory where the build system lives