[nrf fromtree] Bluetooth: Decode Bluetooth 6.1 version number

Bluetooth 6.1 has version number 0x0F and was released in May 2025.
This commit ensures this version number is properly decoded.

Going forward we may consider removing printing the version
number as a string because the feature set is more important
than the version number.

Signed-off-by: Rubin Gerritsen <[email protected]>
(cherry picked from commit b63b993)

Author: rugeGerritsen

include/zephyr/bluetooth/hci_types.h

@@ -858,6 +858,7 @@ struct bt_hci_rp_configure_data_path {
 #define BT_HCI_VERSION_5_3                      12
 #define BT_HCI_VERSION_5_4                      13
 #define BT_HCI_VERSION_6_0                      14
+#define BT_HCI_VERSION_6_1                      15
 
 #define BT_HCI_OP_READ_LOCAL_VERSION_INFO       BT_OP(BT_OGF_INFO, 0x0001) /* 0x1001 */
 struct bt_hci_rp_read_local_version_info {

subsys/bluetooth/host/hci_core.c

@@ -3843,7 +3843,7 @@ const char *bt_hci_get_ver_str(uint8_t core_version)
 {
 	const char * const str[] = {
 		"1.0b", "1.1", "1.2", "2.0", "2.1", "3.0", "4.0", "4.1", "4.2",
-		"5.0", "5.1", "5.2", "5.3", "5.4", "6.0"
+		"5.0", "5.1", "5.2", "5.3", "5.4", "6.0", "6.1"
 	};
 
 	if (core_version < ARRAY_SIZE(str)) {