release: add draft notes for upcoming 3.7.0

Add the new snippet for watchdog timing adjustments (wdt-timing-adj).

Signed-off-by: Stephan Linz <[email protected]>

doc/bridle/releases/release-notes-3.7.0.rst

@@ -136,6 +136,7 @@ Supported snippets
 * USB Console Snippet (usb-console)
 * PWM Servomotor Preset Snippet (pwm-servo)
 * CAN timing adjustments (can-timing-adj)
+* Watchdog timing adjustments (wdt-timing-adj)
 
 Change log
 **********
@@ -201,6 +202,7 @@ Issue Related Items
 
 These GitHub issues were addressed since project bootstrapping:
 
+* :github:`229` - [BUG] magpie_f777ni: wdt_basic_api/drivers.watchdog.stm32wwdg FAILED
 * :github:`227` - [BUG] Unable to build any application referencing bridle version information
 * :github:`222` - [BUG] unsatisfied dependencies by static Kconfig elements
 * :github:`217` - [FCR] Convert board ``arduino_zero`` to board extension