Release 17 new icons and 4 updated icons (v9.21.0)

New Icons

• Blackmagic Design (#5488)
• Deluge (#7262)
• Diners Club (#9868)
• Fairphone (#8268)
• Hilton Hotels & Resorts (#9820)
• Insta360 (#9546)
• Material for MkDocs (#9851)
• Mermaid (#9808)
• mpv (#7293)
• PDM (#9805)
• PlatformIO (#8938)
• PortSwigger (#9869)
• Rye (#9844)
• Satellite (#9468)
• Tricentis (#9219)
• Webex (#8613)
• Wells Fargo (#8867)

Updated Icons

• Hack The Box (#9661)
• Read.cv (#9784)
• SQLAlchemy (#9850)
• Thunderbird (#9761)