docs: use "console" code-hint for shell examples

This replaces the use of bash where suitable, to allow easier copy/pasting
of shell examples without copying the prompt or process output.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

docs/reference/commandline/plugin_disable.md

@@ -27,7 +27,7 @@ a plugin that has references (e.g., volumes, networks) cannot be disabled.
 The following example shows that the `sample-volume-plugin` plugin is installed
 and enabled:
 
-```bash
+```console
 $ docker plugin ls
 
 ID            NAME                                    DESCRIPTION                ENABLED
@@ -36,7 +36,7 @@ ID            NAME                                    DESCRIPTION
 
 To disable the plugin, use the following command:
 
-```bash
+```console
 $ docker plugin disable tiborvass/sample-volume-plugin
 
 tiborvass/sample-volume-plugin