docs: Use new base_dir location

The default for our configuration is currently /var/lib, which was not
reflected in Configuration documentation. This is not really important
as we only share it as "example configuration" but it might create
confussion.
Signed-off-by: NLukáš Doktor <ldoktor@redhat.com>

docs/source/Configuration.rst

@@ -14,9 +14,9 @@ that contain a number of `keys` and `values`. Take for example a basic Avocado c
 .. code-block:: ini
 
     [datadir.paths]
-    base_dir = ~/avocado
-    test_dir = /$HOME/Code/avocado/examples/tests
-    data_dir = /usr/share/avocado/data
+    base_dir = /var/lib/avocado
+    test_dir = /usr/share/avocado/tests
+    data_dir = /var/lib/avocado/data
     logs_dir = ~/avocado/job-results
 
 The ``datadir.paths`` section contains a number of keys, all of them related to directories used by
@@ -105,9 +105,9 @@ configuration, after all the files are parsed in their correct resolution order.
         $HOME/.config/avocado/avocado.conf
 
         Section.Key     Value
-        runner.base_dir /usr/share/avocado
-        runner.test_dir $HOME/Code/avocado/examples/tests
-        runner.data_dir /usr/share/avocado/data
+        runner.base_dir /var/lib/avocado
+        runner.test_dir /usr/share/avocado/tests
+        runner.data_dir /var/lib/avocado/data
         runner.logs_dir ~/avocado/job-results
 
 The command also shows the order in which your config files were parsed, giving you a better understanding of