Fix GHA CI after they upgraded nodejs (AcademySoftwareFoundation#4324)

They upgraded to a version that requires a glibc newer than is in the
pre-2023 ASWF containers.

Signed-off-by: Larry Gritz <lg@larrygritz.com>

.github/workflows/ci.yml

@@ -218,6 +218,8 @@ jobs:
       PYBIND11_VERSION: ${{matrix.pybind11_ver}}
       PYTHON_VERSION: ${{matrix.python_ver}}
       ABI_CHECK: ${{matrix.abi_check}}
+      ACTIONS_RUNNER_FORCE_ACTIONS_NODE_VERSION: node16
+      ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION: true
     steps:
       # We would like to use harden-runner, but it flags too many false
       # positives, every time we download a dependency. We should use it only