Merge pull request #494 from JuliaControl/bench_smaller

bench: testing the three jobs with matrix

Author: franckgaga

.github/workflows/benchmark.yml

@@ -21,5 +21,4 @@ jobs:
         with:
           julia-version: '1'
           job-summary: 'true'
-          filter: ${{ matrix.group }}
-          bench-on: HEAD    # Forces AirspeedVelocity to use the benchmark script from the PR branch, TO DELETE
+          filter: ${{ matrix.group }}