update NASA url (#840)

Co-authored-by: Hynek Schlawack <hs@ox.cx>

README.rst

@@ -23,7 +23,7 @@
 .. teaser-begin
 
 ``attrs`` is the Python package that will bring back the **joy** of **writing classes** by relieving you from the drudgery of implementing object protocols (aka `dunder <https://nedbatchelder.com/blog/200605/dunder.html>`_ methods).
-`Trusted by NASA <https://docs.github.com/en/github/setting-up-and-managing-your-github-profile/personalizing-your-profile#list-of-qualifying-repositories-for-mars-2020-helicopter-contributor-badge>`_ for Mars missions since 2020!
+`Trusted by NASA <https://docs.github.com/en/account-and-profile/setting-up-and-managing-your-github-profile/customizing-your-profile/personalizing-your-profile#list-of-qualifying-repositories-for-mars-2020-helicopter-contributor-badge>`_ for Mars missions since 2020!
 
 Its main goal is to help you to write **concise** and **correct** software without slowing down your code.