docs: fix installer flag hyphens in admin FAQ (#25719)

## Summary
- replace em dashes with double hyphens in the non-admin install flags
- fix the Windows command example so copy/paste works as documented

Fixes #25717

## Testing
- git diff --check
- npx --yes markdownlint-cli2
content/manuals/desktop/troubleshoot-and-support/faqs/general.md

Co-authored-by: Niels Kaspers <nielskaspers@users.noreply.github.com>

Author: nielskaspers

content/manuals/desktop/troubleshoot-and-support/faqs/general.md

@@ -96,7 +96,7 @@ Docker Desktop requires administrator privileges only for installation. Once ins
 {{< tabs >}}
 {{< tab name="Mac" >}}
 
-To run Docker Desktop on Mac without requiring administrator privileges, install via the command line and pass the `—user=<userid>` installer flag:
+To run Docker Desktop on Mac without requiring administrator privileges, install via the command line and pass the `--user=<userid>` installer flag:
 
 ```console
 $ /Applications/Docker.app/Contents/MacOS/install --user=<userid>
@@ -115,13 +115,12 @@ You can then sign in to your machine with the user ID specified, and launch Dock
 >
 > If you are using the WSL 2 backend, first make sure that you meet the [minimum required version](/manuals/desktop/features/wsl/best-practices.md) for WSL 2. Otherwise, update WSL 2 first.  
 
-To run Docker Desktop on Windows without requiring administrator privileges, install via the command line and pass the `—always-run-service` installer flag.
+To run Docker Desktop on Windows without requiring administrator privileges, install via the command line and pass the `--always-run-service` installer flag.
 
 ```console
-$ "Docker Desktop Installer.exe" install —always-run-service
+$ "Docker Desktop Installer.exe" install --always-run-service
 ```
 
 {{< /tab >}}
 {{< /tabs >}}
 
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