fix(ci): Really check APP_ENV in the test context

Both APP_ENV checks of the "Test builder" step ended with a stray double
quote. The first one opened a string that the second one closed, so the
test context check became part of the pattern of the first grep, and was
never run.

Author: lyrixx

.github/workflows/ci.yml

@@ -166,8 +166,8 @@ jobs:
                   EOPHP
 
                   castor test | grep "Hello World"
-                  CASTOR_CONTEXT=default castor app-env | grep 'Environment: not set'"
-                  CASTOR_CONTEXT=test castor app-env | grep 'Environment: test'"
+                  CASTOR_CONTEXT=default castor app-env | grep 'Environment: not set'
+                  CASTOR_CONTEXT=test castor app-env | grep 'Environment: test'
 
             - name: "Test communication with DB"
               run: |