This maintenance release includes a number of fixes and improvements from contributors, testers, and co-developers.

Issues Fixed

• 🐛 Fix Air Assist (#22159)
• 🩹 Extruders 0 patch for PWM Motor Current (#22163)
• 🐛 Fix env validation for 1280/2560 boards (#22150)
• 🐛 Fix MKS Robin E3 build (#22149)
• 🐛 Fix IJK axis references, E stepper indices (#22176, 906fa05bd6)
• 🐛 Fix dual Neopixels (#22174)
• 🐛 Fix heater display options/compile (#22185)
• 🐛 Fix compact sensitive pins array (#22184)
• 🐛 Redundant Temp Sensor followup (#22173)
• 🐛 Fix LCD define typos (927a1a1738)
• 🐛 Define 'HEAD' axes for Markforged (cce585f6ca)
• 🐛 Fix Z_MULTI_ENDSTOPS + NUM_Z_STEPPER_DRIVERS 4 compile (#22203)
• 🔧 Fix E.S.T. sanity-check errors (#22224)
• 🐛 Trigger existing endstops on G38 hit (47631167f9)
• 🐛 Fix Octopus build on case-sensitive FS (#22206)

Improved / Optimized

• ✨ Update/extend Quiet Probing (#22205)

LCD / Controller

• 🌐 Update Russian language (#22193)
• 🌐 Update Ukrainian language (#22183)
• 🌐 Update Italian language (#22182)
• 🚸 MarlinUI Move Z >= 1000 (#22192)
• 🎨 Fix and enhance FTDI Eve Touch UI (#22189, #22223)

Hosts / Protocols

• 🚸 Include 'H' value in M412 report (#22138)

Boards / Pins

• 🐛 TFT encoder pin for BTT GTR (#22162)

General Cleanup

• 📝 Update probe heating value (34066c1717)
• 💡 Add G28 L description (#22144)
• 🎨 Cosmetic cleanup (f2f23e8097, 651f15f833, ec518e6e7b, 003ce25acf)
• 📝 Update TMC SPI endstops comment (#22221)