Remove abuse enabling language

My rationale for these changes is documented on Twitter:
https://twitter.com/JakeHerrington/status/1443286841533374469

Author: jacobherrington

en/community/mailing-lists/ruby-talk-guidelines/index.md

@@ -9,9 +9,7 @@ You should follow these guidelines when posting to the ruby-talk mailing list.
 
 
 1. **Always** be friendly, considerate, tactful, and tasteful. We want to
-   keep this list hospitable to the growing ranks of newbies, very
-   young people, and their teachers, as well as cater to fire breathing
-   wizards. :-)
+   keep this list hospitable and safe for everyone.
 
 2. Keep your content relevant and easy to follow. Try to keep your
    content brief and to the point, but also try to include all relevant

en/conduct/index.md

@@ -18,5 +18,5 @@ commit comments, etc.).
 
  * Participants will be tolerant of opposing views.
  * Participants must ensure that their language and actions are free of personal attacks and disparaging personal remarks.
- * When interpreting the words and actions of others, participants should always assume good intentions.
+ * Participants should speak and act with good intentions, but understand that intent and impact are not equivalent.
  * Behaviour which can be reasonably considered harassment will not be tolerated.