Updated installation examples to use 4.6 (#2620)

* Updated examples to use 4.6

* Changed to variable

Author: mnocon

docs/getting_started/install_ibexa_dxp.md

@@ -165,10 +165,10 @@ To use Composer to instantly create a project in the current folder with all the
 
 !!! tip
 
-    You can set [different version constraints](https://getcomposer.org/doc/articles/versions.md), for example, specific tag (`3.3.2`), version range (`~3.3.2`), or stability (`^3.3@rc`):
+    You can set [different version constraints](https://getcomposer.org/doc/articles/versions.md), for example, specific tag (`[[= latest_tag_4_6 =]]`), version range (`~4.6.10`), or stability (`^4.6@rc`):
 
     ``` bash
-    composer create-project ibexa/experience-skeleton:3.3.2 .
+    composer create-project ibexa/experience-skeleton:[[= latest_tag_4_6 =]] .
     ```
 
 !!! note "Platform.sh"