Remove CS8802 from list of missing pages

Author: BartoszKlonowski

docs/csharp/misc/sorry-we-don-t-have-specifics-on-this-csharp-error.md

@@ -425,7 +425,6 @@ f1_keywords:
   - "CS8793"
   - "CS8794"
   - "CS8801"
-  - "CS8802"
   - "CS8804"
   - "CS8805"
   - "CS8806"