docs(core): add changelogs for prodtest and bootloader

core/embed/bootloader/.changelog.d/3370.added

@@ -1 +0,0 @@
-Added basic support for STM32U5

core/embed/bootloader/.changelog.d/3429.changed

@@ -1 +0,0 @@
-Speed-up device boot

core/embed/bootloader/CHANGELOG.md

@@ -4,6 +4,16 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## 2.1.5 [April 2024]
+
+### Added
+- Added support for T3T1
+- Added basic support for STM32U5  [#3370]
+
+### Changed
+- Speed-up device boot  [#3429]
+
+
 ## 2.1.4 [November 2023]
 
 ### Added
@@ -117,3 +127,5 @@ Internal only release for Model R prototypes.
 [#3205]: https://github.com/trezor/trezor-firmware/pull/3205
 [#3222]: https://github.com/trezor/trezor-firmware/pull/3222
 [#3303]: https://github.com/trezor/trezor-firmware/pull/3303
+[#3370]: https://github.com/trezor/trezor-firmware/pull/3370
+[#3429]: https://github.com/trezor/trezor-firmware/pull/3429

core/embed/prodtest/.changelog.d/3370.added

@@ -1 +0,0 @@
-Added basic support for STM32U5

core/embed/prodtest/CHANGELOG.md

@@ -1,4 +1,14 @@
 
+## 0.2.5 [16th April 2024]
+
+### Added
+- Added basic support for STM32U5.  [#3370]
+- [T3T1] Added support for T3T1.
+- [T3T1] Added `HAPTIC` to test haptic feedback.
+- [T2T1, T3T1] Added `TOUCH VERSION` to get version number of touch controller.
+- Added `VARIANT READ` to read out result of `VARIANT` command.
+
+
 ## 0.2.4 [20th December 2023]
 
 ### Added
@@ -21,3 +31,4 @@
 
 
 [#3325]: https://github.com/trezor/trezor-firmware/pull/3325
+[#3370]: https://github.com/trezor/trezor-firmware/pull/3370