bpo-43888: Reduce coverage collection timeout to 1h40m in GHA (GH-25471)

Ref: 

Signed-off-by: Sviatoslav Sydorenko <webknjaz@redhat.com>

Author: webknjaz

.github/workflows/coverage.yml

@@ -54,6 +54,7 @@ jobs:
         python -m test.pythoninfo
         export PYTHONPATH=`find .venv -name fullcoverage`
     - name: 'Tests with coverage'
+      timeout-minutes: 100  # 1h40m, ref https://bugs.python.org/issue43888
       run: >
         source ./.venv/bin/activate &&
         xvfb-run python -m coverage