Release 12 new icons and 5 updated icons (v15.3.0)

12 new icons

• Activeloop (#13444) (@prem-k-r)
• AdAway (#13367) (@prem-k-r)
• Apache Doris (#13461) (@prem-k-r)
• Better Auth (#13462) (@prem-k-r)
• Booking.com (#13095) (@marlondecol)
• bunny.net (#13480) (@davorj11)
• Cloud Native Build (#13460) (@prem-k-r)
• Haystack (#13360) (@prem-k-r)
• Kenmei (#13233) (@prem-k-r)
• Mistral AI (#12764) (@DerBraky)
• MyShows (#13276) (@prem-k-r)
• Vanilla Extract (#13502) (@injoonH)

5 updated icons

• Iconify (#13492) (@prem-k-r)
• Jinja (#13496) (@Soumava-221B)
• Launchpad (#13495) (@prem-k-r)
• Material Design (#13481) (@prem-k-r)
• Plotly (#13477) (@prem-k-r)