Updated test run yaml.

Author: lu-ohai

.github/workflows/run-unittests-py38-cov-report.yml

@@ -46,7 +46,8 @@ jobs:
               --ignore tests/unitary/with_extras/feature_store \
               --ignore  tests/unitary/with_extras/operator/feature-store \
               --ignore tests/unitary/with_extras/operator/forecast \
-              --ignore tests/unitary/with_extras/hpo
+              --ignore tests/unitary/with_extras/hpo \
+              --ignore tests/unitary/with_extras/langchain
           - name: "slow_tests"
             test-path: "tests/unitary/with_extras/model"