Update contrib SHA

Author: ocelotl

.github/workflows/test.yml

@@ -10,7 +10,7 @@ env:
   # Otherwise, set variable to the commit of your branch on
   # opentelemetry-python-contrib which is compatible with these Core repo
   # changes.
-  CONTRIB_REPO_SHA: 481972cf87c1506e789f586843ba82d93633eac7
+  CONTRIB_REPO_SHA: bf9f748f4cde9dbb334cd4930af2ab8d2a52a1b0
   # This is needed because we do not clone the core repo in contrib builds anymore.
   # When running contrib builds as part of core builds, we use actions/checkout@v2 which
   # does not set an environment variable (simply just runs tox), which is different when