[ImgBot] Optimize images

*Total -- 3,911.39kb -> 3,055.78kb (21.87%)

/assets/img/giphy-for-livechat-installed.png -- 68.56kb -> 46.10kb (32.76%)
/assets/img/giphy-for-livechat-uninstalled.png -- 67.45kb -> 45.63kb (32.35%)
/assets/img/giphy-for-livechat-message-box.png -- 15.75kb -> 10.68kb (32.17%)
/assets/img/google-for-helpdesk-signin.png -- 247.98kb -> 183.06kb (26.18%)
/assets/img/loom-for-livechat-init.png -- 264.39kb -> 199.59kb (24.51%)
/assets/img/google-for-helpdesk-init.png -- 319.01kb -> 247.73kb (22.34%)
/assets/img/loom-for-livechat-finishing.png -- 285.60kb -> 222.44kb (22.12%)
/assets/img/google-for-helpdesk-details.png -- 309.96kb -> 242.21kb (21.86%)
/assets/img/google-for-helpdesk-calendar-select.png -- 320.48kb -> 251.26kb (21.6%)
/assets/img/google-for-helpdesk-calendar.png -- 326.85kb -> 256.70kb (21.46%)
/assets/img/loom-for-livechat-inserting.png -- 309.69kb -> 243.72kb (21.3%)
/assets/img/google-for-helpdesk-section-update.png -- 332.63kb -> 262.39kb (21.12%)
/assets/img/google-for-helpdesk-successful.png -- 331.15kb -> 261.51kb (21.03%)
/assets/img/loom-for-livechat-configuring.png -- 310.37kb -> 248.23kb (20.02%)
/assets/img/loom-for-livechat-details-box.png -- 401.53kb -> 334.53kb (16.69%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

Author: ImgBotApp