Release notes for 0.19.x Hotfix 12 (Release Channel)

[kjozwiak]

Release Notes:

• Update Muon to 4.5.38. (#12602)
• Monthly budget reverts from 5.0 BAT -> 25 BAT when restarting. (#12581)
• Have a changeable default contribution amount for new installs (until user locks value). (#12573)
• Brave reports as vulnerable to spectre on test site. (#12570)
• Trezor passphrase being saved to password list and offered by auto fill without permission.. (#12563)
• "Always show the URL bar" text missing in preferences. (#12559)
• Revert muted media should be able to autoplay. (#12152)
• Restoring a wallet backup (wallet v2) sometimes fails and then only shows "a". (#11383)
• Brave fills in some password on sites, even though I explicitly turned off password management.. (#10566)