chore: docs refresher

[cmwylie19]

Description

Docs Refresher, as I was pointing out places in our docs doing the backwards compatability doc, I saw several places our docs needed to be updated.

• remove reference to pepr-istio from docs as it is deprecated

Related Issue

Fixes #

Relates to #

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Other (security config, docs update, etc)

Checklist before merging

• Unit, Journey, E2E Tests, docs, adr added or updated as needed
• Contributor Guide Steps followed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.52%. Comparing base (5bb2bea) to head (4069d40).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1683   +/-   ##
=======================================
  Coverage   79.52%   79.52%           
=======================================
  Files          48       48           
  Lines        2090     2090           
  Branches      460      460           
=======================================
  Hits         1662     1662           
- Misses        398      426   +28     
+ Partials       30        2   -28     

see 8 files with indirect coverage changes