update AI guides using App Platform for LKE (#7364)

* update apl ai guides

* change python script

* fix spellchecker issues

* fix trailing whitespaces

* fix more spellchecker issues

* fix typos

* update descriptions

* Copy edits

---------

Co-authored-by: nmelehan-akamai <[email protected]>
Co-authored-by: Matt Wildman <[email protected]>

Author: 3 people

ci/vale/dictionary.txt

@@ -1914,6 +1914,7 @@ pg_dump
 pg_dumpall
 pg_restore
 pgAdmin
+PGvector
 pgpass
 Phalcon
 pharmer

docs/contributors/sander-rodenhuis/_index.md

@@ -0,0 +1,8 @@
+---
+title: "Sander Rodenhuis"
+link: "https://www.linkedin.com/in/srodenhuis/"
+email: "[email protected]"
+description: "The Linode documentation library's profile page and submission listing for Sander Rodenhuis"
+---
+
+Sander Rodenhuis is a Principal Architect at Akamai and one of creators of App Platform for LKE (Linode Kubernetes Engine).