Fix usage examples in README. (#205)

Co-authored-by: Matteo Pace <pace.matteo96@gmail.com>

Author: cthain

README.md

@@ -79,7 +79,7 @@ In order to run the coraza-proxy-wasm we need to spin up an envoy configuration
                                     "SecRule REQUEST_URI \"@streq /admin\" \"id:101,phase:1,t:lowercase,deny\""
                                 ]
                             },
-                            "default_directives": "default",
+                            "default_directives": "default"
                         }
                     vm_config:
                         runtime: "envoy.wasm.runtime.v8"
@@ -102,13 +102,14 @@ configuration:
     {
         "directives_map": {
             "default": [
+                "Include @demo-conf",
                 "SecDebugLogLevel 9",
                 "SecRuleEngine On",
                 "Include @crs-setup-demo-conf",
                 "Include @owasp_crs/*.conf"
             ]
         },
-        "default_directives": "default",
+        "default_directives": "default"
     }
 ```
 
@@ -121,13 +122,14 @@ configuration:
     {
         "directives_map": {
             "default": [
+                "Include @demo-conf",
                 "SecDebugLogLevel 9",
                 "SecRuleEngine On",
                 "Include @crs-setup-demo-conf",
                 "Include @owasp_crs/REQUEST-901-INITIALIZATION.conf"
             ]
         },
-        "default_directives": "default",
+        "default_directives": "default"
     }
 ```