Hygiene: reformat mobile-html CSP header
Hygiene: reformat mobile-html CSP header

No functionality changes intended.

Change-Id: I8e00938481edbacb369f1e94c352818cedfa7a6a

wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps