linux-firmware: Update firmware file for Intel Bluetooth 9260

This patch updates the firmware file for Intel Bluetooth 9260
Also it is known as Intel ThunderPeak (THP).

FW Build: REL0420

Release Version: 21.0.0.4
Signed-off-by: Amit K Bag <amit.k.bag@intel.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -3211,13 +3211,13 @@ Version: BT_JeffersonPeak_A0_B0_REL0201
 File: intel/ibt-17-1.ddc
 Version: BT_JeffersonPeak_A0_B0_REL0201
 File: intel/ibt-18-16-1.sfi
-Version: BT_ThunderPeak_B0_B0_REL0395
+Version: BT_ThunderPeak_B0_B0_REL0420
 File: intel/ibt-18-16-1.ddc
-Version: BT_ThunderPeak_B0_B0_REL0395
+Version: BT_ThunderPeak_B0_B0_REL0420
 File: intel/ibt-18-2.sfi
-Version: BT_ThunderPeak_B0_B0_REL0395
+Version: BT_ThunderPeak_B0_B0_REL0420
 File: intel/ibt-18-2.ddc
-Version: BT_ThunderPeak_B0_B0_REL0395
+Version: BT_ThunderPeak_B0_B0_REL0420
 File: intel/ibt-18-0-1.sfi
 Version: BT_ThunderPeak_A0_B0_REL0201
 File: intel/ibt-18-0-1.ddc