Include propagator benchmarks + latest GH action

* When we moved the aws-xray propagator in open-telemetry#720, we needed to update the benchmark step of the workflow
* Additionally, the GH action has evolved since we added benchmarks so we should use the latest version

.github/workflows/test.yml

@@ -47,15 +47,15 @@ jobs:
         run: tox -f ${{ matrix.python-version }}-${{ matrix.package }} -- --benchmark-json=${{ env.RUN_MATRIX_COMBINATION }}-benchmark.json
       - name: Find and merge benchmarks
         # TODO: Add at least one benchmark to every package type to remove this (#249)
-        if: matrix.package == 'sdkextension'
+        if: matrix.package == 'sdkextension' || matrix.package == 'propagator'
         run: >-
           jq -s '.[0].benchmarks = ([.[].benchmarks] | add)
           | if .[0].benchmarks == null then null else .[0] end'
           **/**/tests/*${{ matrix.package }}*-benchmark.json > output.json
       - name: Report on benchmark results
         # TODO: Add at least one benchmark to every package type to remove this (#249)
-        if: matrix.package == 'sdkextension'
-        uses: rhysd/github-action-benchmark@v1
+        if: matrix.package == 'sdkextension' || matrix.package == 'propagator'
+        uses: benchmark-action/github-action-benchmark@v1
         with:
           name: OpenTelemetry Python Benchmarks - Python ${{ env[matrix.python-version ]}} - ${{ matrix.package }}
           tool: pytest