[ImgBot] Optimize images

*Total -- 1,210.93kb -> 949.95kb (21.55%)

/docs/assets/img/frontends/libretube-dark.svg -- 2.36kb -> 1.34kb (43.12%)
/docs/assets/img/multi-factor-authentication/yubico-otp.it.png -- 136.91kb -> 82.80kb (39.52%)
/docs/assets/img/multi-factor-authentication/yubico-otp.fr.png -- 172.94kb -> 108.54kb (37.24%)
/docs/assets/img/multi-factor-authentication/yubico-otp.es.png -- 136.56kb -> 100.04kb (26.75%)
/docs/assets/img/multi-factor-authentication/fido.fr.png -- 144.29kb -> 112.90kb (21.75%)
/docs/assets/img/multi-factor-authentication/fido.it.png -- 94.67kb -> 74.65kb (21.14%)
/docs/assets/img/frontends/libretube.svg -- 1.23kb -> 1.01kb (17.28%)
/docs/assets/img/router/opnsense.svg -- 9.50kb -> 7.95kb (16.31%)
/docs/assets/img/android/f-droid.svg -- 20.61kb -> 17.54kb (14.89%)
/docs/assets/img/multi-factor-authentication/yubico-otp.he.png -- 153.51kb -> 132.32kb (13.8%)
/docs/assets/img/multi-factor-authentication/fido.he.png -- 126.64kb -> 112.20kb (11.41%)
/docs/assets/img/multi-factor-authentication/fido.es.png -- 115.84kb -> 104.80kb (9.53%)
/docs/assets/img/frontends/nitter.svg -- 0.82kb -> 0.78kb (5.36%)
/docs/assets/img/frontends/yattee.svg -- 1.13kb -> 1.07kb (4.68%)
/docs/assets/img/frontends/proxitok.svg -- 1.01kb -> 0.97kb (3.85%)
/docs/assets/img/file-sharing-sync/send.svg -- 1.18kb -> 1.14kb (3.39%)
/docs/assets/img/how-tor-works/tor-path-dark.nl.svg -- 14.74kb -> 14.44kb (2.05%)
/docs/assets/img/how-tor-works/tor-path-dark.fr.svg -- 14.75kb -> 14.44kb (2.05%)
/docs/assets/img/how-tor-works/tor-path-dark.he.svg -- 14.76kb -> 14.45kb (2.05%)
/docs/assets/img/how-tor-works/tor-path.nl.svg -- 14.68kb -> 14.38kb (2.04%)
/docs/assets/img/how-tor-works/tor-path.fr.svg -- 14.68kb -> 14.38kb (2.04%)
/docs/assets/img/how-tor-works/tor-path.he.svg -- 14.70kb -> 14.40kb (2.04%)
/docs/assets/img/password-management/strongbox.svg -- 3.44kb -> 3.40kb (1.14%)

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