Merge pull request #3027 from NextTurn/sa1202

Add 'private protected' to SA1202 docs

documentation/SA1202.md

@@ -31,6 +31,7 @@ To comply with this rule, adjacent elements of the same type should be positione
 * internal
 * protected internal
 * protected
+* private protected
 * private
 
 :memo: Static constructors and explicitly implemented interface members are considered *public* for the purposes of this