linux-firmware: Update firmware patch for Intel Bluetooth 7260 (B5/B6)

This patch updates the firmware patch for Intel Bluetooth 7260 (B5/B6)
also known as Intel WP2 B5 and WP1 B6.

Patch Version: 37

Release Version: 18.15

Signed-off-by: Tedd Ho-Jeong An <tedd.an@intel.com>
Signed-off-by: Kyle McMartin <kyle@kernel.org>