doc: release: Fix a couple more typos in release doc
doc: release: Fix a couple more typos in release doc

Fixing a couple more typos in release-notes-3.1.rst

Signed-off-by: Connor Graydon <8b60078e3828617272e8d1195802eb9da08f6bf9@intel.com>

galak/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr