Add docs on keybindings to trigger runnables (#25582)

Viktor Zahorodnii and Kirill Bulatov created 

Addresses
https://github.com/zed-industries/zed/discussions/22810#discussioncomment-12239661

Release Notes:

- N/A

---------

Co-authored-by: Kirill Bulatov <kirill@zed.dev>

Change summary

docs/src/tasks.md | 4 ++++
1 file changed, 4 insertions(+)

Detailed changes

docs/src/tasks.md 🔗 

@@ -198,3 +198,7 @@ To tag a task, add the runnable tag name to the `tags` field on the task templat
 ```
 
 In doing so, you can change which task is shown in the runnables indicator.
+
+## Keybindings to run tasks bound to runnables
+
+When you have a task definition that is bound to the runnable, you can quickly run it using [Code Actions](https://zed.dev/docs/configuring-languages?#code-actions) that you can trigger either via `editor: Toggle Code Actions` command or by the `cmd-.`/`ctrl-.` shortcut. Your task will be the first in the dropdown. The task will run immediately if there are no additional Code Actions for this line.