change "toolsay" to "dotnetsay"

Change in package name.

Author: BillWagner

docs/core/whats-new/dotnet-10/sdk.md

@@ -32,8 +32,8 @@ These new tools work much like normal published applications, so any publishing
 You can now use the `dotnet tool exec` command to execute a .NET tool without installing it globally or locally. This is especially valuable for CI/CD or ephemeral usage.
 
 ```bash
-dotnet tool exec --source ./artifacts/package/ toolsay "Hello, World!"
-Tool package toolsay@1.0.0 will be downloaded from source <source>.
+dotnet tool exec --source ./artifacts/package/ dotnetsay  "Hello, World!"
+Tool package dotnetsay @1.0.0 will be downloaded from source <source>.
 Proceed? [y/n] (y): y
   _   _          _   _                __        __                 _       _   _
  | | | |   ___  | | | |   ___         \ \      / /   ___    _ __  | |   __| | | |
@@ -43,7 +43,7 @@ Proceed? [y/n] (y): y
                                 |/
 ```
 
-This downloads and runs the specified tool package in one command. By default, users are prompted to confirm the download if the tool doesn't already exist locally. The latest version of the chosen tool package is used unless an explicit version is specified (for example, `toolsay@0.1.0`).
+This downloads and runs the specified tool package in one command. By default, users are prompted to confirm the download if the tool doesn't already exist locally. The latest version of the chosen tool package is used unless an explicit version is specified (for example, `dotnetsay @0.1.0`).
 
 One-shot tool execution works seamlessly with local tool manifests. If you run a tool from a location containing a `.config/dotnet-tools.json` nearby, the version of the tool in that configuration will be used instead of the latest version available.
 
@@ -52,7 +52,7 @@ One-shot tool execution works seamlessly with local tool manifests. If you run a
 The `dnx` script provides a streamlined way to execute tools. It forwards all arguments to the `dotnet` CLI for processing, making tool usage as simple as possible:
 
 ```bash
-dnx toolsay "Hello, World!"
+dnx dotnetsay  "Hello, World!"
 ```
 
 The actual implementation of the `dnx` command is in the `dotnet` CLI itself, allowing its behavior to evolve over time.