fix ansible apt install package

the 'docker' package is the desktop tray application and running the playbook fails at installing that one. 'docker.io' seems to be the package we need and it does work on Ubuntu 22.04 Server

Author: Xronophobe

chapter_11_ansible.asciidoc

@@ -322,7 +322,7 @@ for.
 
     - name: Install docker  #<1>
       ansible.builtin.apt:  #<2>
-        name: docker  #<3>
+        name: docker.io  #<3>
         state: latest
         update_cache: true
       become: true
@@ -347,7 +347,7 @@ for.
   around the `apt` Debian & Ubuntu package management tool.
 
 <3> Each module then provides a bunch of parameters which control how it works.
-    Here we specify the `name` of the package we want to install ("docker")
+    Here we specify the `name` of the package we want to install ("docker.io")
     and tell it update its cache first, which is required on a fresh server.
 
 Most Ansible modules have pretty good documentation,
@@ -487,7 +487,7 @@ In Ansible config, it looks like this:
   tasks:
     - name: Install docker
       ansible.builtin.apt:
-        name: docker
+        name: docker.io
         state: latest
       become: true