Proper usage of secrets in matrix

Author: MatKuhr

.github/workflows/e2e-test.yaml

@@ -44,7 +44,7 @@ jobs:
           mvn $MVN_ARGS "-Daicore.landscape=${{ matrix.environment }}"
         env:
           # See "End-to-end test application instructions" on the README.md to update the secret
-          AICORE_SERVICE_KEY: ${{ matrix.secret-name }}
+          AICORE_SERVICE_KEY: ${{ secrets[matrix.secret-name] }}
 
       - name: "Start Application Locally"
         run: |
@@ -61,7 +61,7 @@ jobs:
           done
         env:
           # See "End-to-end test application instructions" on the README.md to update the secret
-          AICORE_SERVICE_KEY: ${{ matrix.secret-name }}
+          AICORE_SERVICE_KEY: ${{ secrets[matrix.secret-name] }}
 
       - name: "Health Check"
         # print response body with headers to stdout.  q:body only  O:print  -:stdout  S:headers