Update dependency rules_dotnet to v0.20.1

MODULE.bazel

diff --git a/MODULE.bazel b/MODULE.bazel
index 3d1f0e1..7c258e2 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -2,7 +2,7 @@
 bazel_dep(name = "gazelle", version = "0.45.0")
 bazel_dep(name = "protobuf", version = "31.1")
 bazel_dep(name = "rules_cc", version = "0.2.10")
-bazel_dep(name = "rules_dotnet", version = "0.19.2")
+bazel_dep(name = "rules_dotnet", version = "0.20.1")
 bazel_dep(name = "rules_go", version = "0.57.0")
 bazel_dep(name = "rules_java", version = "8.15.2")
 bazel_dep(name = "rules_scala", version = "7.1.2")

modules/csharp/MODULE.bazel

diff --git a/modules/csharp/MODULE.bazel b/modules/csharp/MODULE.bazel
index 8c748ac..b3a5817 100644
--- a/modules/csharp/MODULE.bazel
+++ b/modules/csharp/MODULE.bazel
@@ -5,7 +5,7 @@
 )
 
 bazel_dep(name = "grpc", version = "1.74.1")
-bazel_dep(name = "rules_dotnet", version = "0.19.2")
+bazel_dep(name = "rules_dotnet", version = "0.20.1")
 bazel_dep(name = "rules_proto_grpc", version = "0.0.0.rpg.version.placeholder")
 
 main_extension = use_extension("//paket:paket.main_extension.bzl", "main_extension")

tools/rulegen/MODULE.bazel.template

diff --git a/tools/rulegen/MODULE.bazel.template b/tools/rulegen/MODULE.bazel.template
index 701556e..dde1fe0 100644
--- a/tools/rulegen/MODULE.bazel.template
+++ b/tools/rulegen/MODULE.bazel.template
@@ -2,7 +2,7 @@
 bazel_dep(name = "gazelle", version = "0.45.0")
 bazel_dep(name = "protobuf", version = "31.1")
 bazel_dep(name = "rules_cc", version = "0.2.10")
-bazel_dep(name = "rules_dotnet", version = "0.19.2")
+bazel_dep(name = "rules_dotnet", version = "0.20.1")
 bazel_dep(name = "rules_go", version = "0.57.0")
 bazel_dep(name = "rules_java", version = "8.15.2")
 bazel_dep(name = "rules_scala", version = "7.1.2")