Disable captcha by default, add instructions on how to add it

comments.yaml

@@ -50,15 +50,15 @@ form:
           type: hidden
           evaluateDefault: grav.uri.path
 
-        - name: g-recaptcha-response
-          label: Captcha
-          type: captcha
-          recatpcha_site_key: e32iojeoi32jeoi32jeoij32oiej32oiej3
-          recaptcha_not_validated: 'Captcha not valid!'
-          validate:
-            required: true
-          process:
-            ignore: true
+#        - name: g-recaptcha-response
+#          label: Captcha
+#          type: captcha
+#          recatpcha_site_key: e32iojeoi32jeoi32jeoij32oiej32oiej3
+#          recaptcha_not_validated: 'Captcha not valid!'
+#          validate:
+#            required: true
+#          process:
+#            ignore: true
 
     buttons:
         - type: submit
@@ -68,8 +68,8 @@ form:
         - email:
             subject: "[New Comment] from {{ form.value.name|e }}"
             body: "{% include 'forms/data.html.twig' %}"
-        - captcha:
-            recatpcha_secret: ej32oiej23oiej32oijeoi32jeio32je
+#        - captcha:
+#            recatpcha_secret: ej32oiej23oiej32oijeoi32jeio32je
         - addComment:
         - message: Thank you for writing your comment!