Use GHA "working-directory" instead of cd'ing (#969)

A better practice for jobs where the first step is to `cd` into a
directory is to use the field `working-directory` in the step definition
and skip the `cd`.

Author: mhucka

.github/workflows/ci.yaml

@@ -441,9 +441,8 @@ jobs:
         run: docker run --rm qsim-base:latest -c /qsim/circuits/circuit_q24
 
       - name: Test installation process
-        run: |
-          cd install/tests
-          docker compose build
+        working-directory: install/tests
+        run: docker compose build
 
   report-results:
     name: CI