add spelling exceptions

Author: Blargian

scripts/aspell-dict-file.txt

@@ -1063,4 +1063,14 @@ microsoft
 --docs/use-cases/observability/clickstack/migration/elastic/migrating-data.md--
 clickstack
 --docs/use-cases/AI_ML/MCP/librechat.md--
-librechat
+librechat
+--docs/integrations/language-clients/csharp.md--
+BigDecimal
+BigInteger
+IPAddress
+Kozlyuk
+NuGet
+Oleg
+sbyte
+ulong
+ushort