Merge branch 'archwiki-robots.txt' into 'master'

archwiki: update robots.txt

See merge request !785

roles/archwiki/files/robots.txt

 User-agent: *
 Disallow: /index.php?
-Disallow: /index.php?diff=
-Disallow: /index.php?oldid=
-Disallow: /index.php?curid=
-Disallow: /index.php?title=Help
-Disallow: /index.php?title=Image
-Disallow: /index.php?title=MediaWiki
-Disallow: /index.php?title=Special:
-Disallow: /index.php?title=Template
 Disallow: /skins/
+Disallow: /title/File:
+Disallow: /title/Image:
+Disallow: /title/MediaWiki:
+Disallow: /title/Special:
+Disallow: /title/Template: