Fix dotnet-suggest zsh completion shim

[arussellk]

The zsh completion script has a subtle error in which it calls dotnet suggest instead of dotnet-suggest. This error makes tab completion on zsh non-functional for me.

To trigger the error:

1. Install dotnet-suggest per the instructions here: https://learn.microsoft.com/en-us/dotnet/standard/commandline/tab-completion
2. Shim completions in zsh
3. Reload shell
4. Trigger completions with % dotnet-suggest <tab>
5. See the following output (% is the zsh prompt, <tab> indicates when to press the tab key):

% dotnet-suggest <tab>Could not execute because the specified command or file was not found.
        dotnet-suggest
  * You intended to execute a .NET program, but dotnet-get does not exist.^M
  * You intended to run a global tool, but a dotnet-prefixed executable with this name could not be found on the PATH.
  * You misspelled a built-in dotnet command.^M
Possible reasons for this include

The output is from the dotnet tool itself:

% dotnet suggest get
Could not execute because the specified command or file was not found.
Possible reasons for this include:
  * You misspelled a built-in dotnet command.
  * You intended to execute a .NET program, but dotnet-get does not exist.
  * You intended to run a global tool, but a dotnet-prefixed executable with this name could not be found on the PATH.

If I fix the shim (i.e., dotnet suggest -> dotnet-suggest) and reload the shell, the completions work as-expected:

% dotnet-suggest <tab>
--help     -?         /?         get        register
--version  -h         /h         list       script

The bash and powershell scripts correctly use dotnet-suggest:

• Bash: https://github.com/dotnet/command-line-api/blob/803d8598f98fb4efd94604b32627ee9407f246db/src/System.CommandLine.Suggest/dotnet-suggest-shim.bash#L4
• Powershell: https://github.com/dotnet/command-line-api/blob/803d8598f98fb4efd94604b32627ee9407f246db/src/System.CommandLine.Suggest/dotnet-suggest-shim.ps1#L12