Small documentation fixes (#70480)

* Add type for options in the sample module shown in Developing Modules, as this is required to have the tests being
green
* Remove duplicated strings: the same sentence is in "Python tips" and "Module security", keeping the
latter.

docs/docsite/rst/dev_guide/developing_modules_best_practices.rst

@@ -53,7 +53,6 @@ Functions and Methods
 Python tips
 ===========
 
-* When fetching URLs, use ``fetch_url`` or ``open_url`` from ``ansible.module_utils.urls``. Do not use ``urllib2``, which does not natively verify TLS certificates and so is insecure for https.
 * Include a ``main`` function that wraps the normal execution.
 * Call your ``main`` function from a conditional so you can import it into unit tests - for example:
 

docs/docsite/rst/dev_guide/developing_modules_general.rst

@@ -78,10 +78,12 @@ To create a new module:
         name:
             description:
                 - This is the message to send to the test module
+            type: str
             required: true
         new:
             description:
                 - Control to demo if the result of this module is changed or not
+            type: bool
             required: false
 
     extends_documentation_fragment: