minor #1144 Update index.rst (tacman)

This PR was merged into the 2.x branch.

Discussion
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Update index.rst

Fix debug:twig-component code

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Tickets       | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

Error in the way the command was run.

Commits
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a606b31 Update index.rst

src/TwigComponent/doc/index.rst

@@ -1128,7 +1128,7 @@ who live in ``templates/components``:
 
 .. code-block:: terminal
 
-    $ php bin/console debug:component
+    $ php bin/console debug:twig-component
 
     +---------------+-----------------------------+------------------------------------+------+
     | Component     | Class                       | Template                           | Live |
@@ -1162,7 +1162,7 @@ component details:
 
 .. code-block:: terminal
 
-    $ php bin/console debug:component RandomNumber
+    $ php bin/console debug:twig-component RandomNumber
 
     +---------------------------------------------------+-----------------------------------+
     | Property                                          | Value                             |