[v9.3.x] Docs: Updating sign plugin docs (#59419)

Docs: Updating sign plugin docs (#59322)

Updating sign plugin docs

(cherry picked from commit 5a3f0e8696)

Co-authored-by: Timur Olzhabayev <timur.olzhabayev@grafana.com>

docs/sources/developers/plugins/sign-a-plugin.md

@@ -40,11 +40,9 @@ Public plugins need to be reviewed by the Grafana team before you can sign them.
 
    ```bash
    export GRAFANA_API_KEY=<YOUR_API_KEY>
-   npx @grafana/sign-plugin plugin:sign
+   npx @grafana/sign-plugin
    ```
 
-> **Note:** If running NPM 7+ the `npx` commands mentioned in this article may hang. The workaround is to use `npx --legacy-peer-deps <command to run>`.
-
 ## Sign a private plugin
 
 1. In your plugin directory, sign the plugin with the API key you just created. Grafana Sign Plugin creates a [MANIFEST.txt](#plugin-manifest) file in the `dist` directory of your plugin.
@@ -53,7 +51,7 @@ Public plugins need to be reviewed by the Grafana team before you can sign them.
 
    ```bash
    export GRAFANA_API_KEY=<YOUR_API_KEY>
-   npx @grafana/sign-plugin plugin:sign --rootUrls https://example.com/grafana
+   npx @grafana/sign-plugin --rootUrls https://example.com/grafana
    ```
 
 ## Plugin signature levels