Don't let a failed build prevent others from running.

.github/workflows/CI.yml

@@ -9,6 +9,7 @@ on:
 jobs:
  linux_make_check:
  runs-on: ubuntu-22.04
+ continue-on-error: true
  strategy:
  matrix:
  compiler: [gcc-9, gcc-10, gcc-11, gcc-12, gcc-13, clang-11, clang-12, clang-13, clang-14, clang-15, clang-16, clang-17]