d/apache2.conf: fix apache2 config

Previous to this commit, the config file was invalid:

 [warn] The apache2 configtest failed. ... (warning).
 Output of config test was:
 apache2: Syntax error on line 219 of /etc/apache2/apache2.conf:
  Syntax error on line 75 of /etc/apache2/sites-enabled/gestioip.conf:
  </VirtualHost> without matching <VirtualHost> section
  Action 'configtest' failed.
 The Apache error log may have more information.

This is a bug introduced by myself at commit:
 2383481 [d/gestioip: add basic apache2 config file].

Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>