Update src/membership.md

Co-authored-by: Josh Triplett <[email protected]>

src/membership.md

@@ -36,7 +36,7 @@ Lang team members can propose new additions to the team as follows:
 These are the questions we ask ourselves when deciding whether someone would be a good choice as a lang team member.
 
 * Has this person demonstrated **strong language design skills**?
-    * Have they made major contributions to an area of the language, such as leading an impactful initiative to completion?
+    * Have they made notable contributions to an area of the language, such as leading an impactful initiative to completion?
     * Are they able to identify flaws in a design and, just as importantly, come up with creative solutions?
 * Is this person **responsible**?
     * When they agree to take on a task, do they either get it done or identify that they are not able to follow through and ask for help?