release: additional entries in release notes

* Bluetooth Host qualification in 2.7 (#39882)
* sensor: qdec_nrfx: PM callback.. (#39687)
* drivers: ieee802154_dw1000: use dedicated wq (#41237)
* spi: slave: division by zero in timeout calculation (#39609)
* Possible bug or undocumented behaviour of spi_write (#39594)

Signed-off-by: Christopher Friedt <chrisfriedt@gmail.com>