update actions

Author: Adam-

.github/workflows/build.yml

@@ -93,7 +93,7 @@ jobs:
     needs: [windows, macos]
     runs-on: ubuntu-24.04
     container:
-      image: amd64/ubuntu:20.04
+      image: amd64/ubuntu:18.04
     steps:
     - uses: actions/checkout@v4
     - name: install dependencies