update docs (#8819)

Fixes #8733

docs/source/languages/c_sharp.md

diff --git a/docs/source/languages/c_sharp.md b/docs/source/languages/c_sharp.md
index 07f879a..ce48aa2 100644
--- a/docs/source/languages/c_sharp.md
+++ b/docs/source/languages/c_sharp.md
@@ -23,7 +23,7 @@
 
 ## Building the FlatBuffers C# library
 
-The `FlatBuffers.csproj` project contains multitargeting for .NET Standard 2.1,
+The `FlatBuffers.csproj` project contains multitargeting for .NET Standard 2.0, 2.1,
 .NET 6 and .NET 8.
 
 You can build for a specific framework target when using the cross-platform