docs: Display action names in backticks instead of quotes (#41248)

Marshall Bowers created 

This PR fixes some instances where we were displaying action names in
quotes instead of in backticks.

Also fixed some mentions of using an action to open the settings file,
as this has changed after the release of the settings UI.

Release Notes:

- N/A

Change summary

docs/src/ai/llm-providers.md | 2 +-
docs/src/icon-themes.md      | 4 ++--
docs/src/themes.md           | 4 ++--
3 files changed, 5 insertions(+), 5 deletions(-)

Detailed changes

docs/src/ai/llm-providers.md 🔗 

@@ -64,7 +64,7 @@ With that done, choose one of the two authentication methods:
 #### Authentication via Named Profile (Recommended)
 
 1. Ensure you have the AWS CLI installed and configured with a named profile
-2. Open your `settings.json` (`zed: open settings`) and include the `bedrock` key under `language_models` with the following settings:
+2. Open your `settings.json` (`zed: open settings file`) and include the `bedrock` key under `language_models` with the following settings:
    ```json [settings]
    {
      "language_models": {

docs/src/icon-themes.md 🔗 

@@ -10,11 +10,11 @@ Navigating through the icon theme list by moving up and down will change the ico
 
 ## Installing more Icon Themes
 
-More icon themes are available from the Extensions page, which you can access via the command palette with "zed: Extensions" or the [Zed website](https://zed.dev/extensions).
+More icon themes are available from the Extensions page, which you can access via the command palette with `zed: extensions` or the [Zed website](https://zed.dev/extensions).
 
 ## Configuring Icon Themes
 
-Your selected icon theme is stored in your settings file. You can open your settings file from the command palette with "zed: open settings" (bound to `cmd-,` on macOS and `ctrl-,` on Linux).
+Your selected icon theme is stored in your settings file. You can open your settings file from the command palette with `zed: open settings file` (bound to `cmd-alt-,` on macOS and `ctrl-alt-,` on Linux).
 
 Just like with themes, Zed allows for configuring different icon themes for light and dark mode. You can set the mode to `"light"` or `"dark"` to ignore the current system mode.

docs/src/themes.md 🔗 

@@ -10,13 +10,13 @@ Navigating through the theme list by moving up and down will change the theme in
 
 ## Installing more Themes
 
-More themes are available from the Extensions page, which you can access via the command palette with "zed: Extensions" or the [Zed website](https://zed.dev/extensions).
+More themes are available from the Extensions page, which you can access via the command palette with `zed: extensions` or the [Zed website](https://zed.dev/extensions).
 
 Many popular themes have been ported to Zed, and if you're struggling to choose one, visit [zed-themes.com](https://zed-themes.com), a third-party gallery with visible previews for many of them.
 
 ## Configuring a Theme
 
-Your selected theme is stored in your settings file. You can open your settings file from the command palette with "zed: Open Settings" (bound to `cmd-,` on macOS and `ctrl-,` on Linux).
+Your selected theme is stored in your settings file. You can open your settings file from the command palette with `zed: open settings file` (bound to `cmd-alt-,` on macOS and `ctrl-alt-,` on Linux).
 
 By default, Zed maintains two themes: one for light mode and one for dark mode. You can set the mode to `"dark"` or `"light"` to ignore the current system mode.