west.yml: MCUboot synchronization from upstream

[nordicjm]

Update Zephyr fork of MCUboot to revision:
48b0f6da9af8d009eb8eafba023998a7d85320a1

Brings following Zephyr relevant fixes:

• 48b0f6da imgtool: support producing images in test mode
• 2b9f2a2f boot: zephyr: fix getting base address for certain boards
• 028d80c3 bootutil: Move boot_enc_init in boot_swap_image
• 15d43f20 zephyr: Deprecate MCUBOOT_VERIFY_IMG_ADDRESS
• fd2c1428 zephyr: Added MCUBOOT_CHECK_HEADER_LOAD_ADDRESS Kconfig
• 1035cc01 bootutil: Add MCUBOOT_CHECK_HEADER_LOAD_ADDRESS
• 17a6ecd2 boot: bootutil: fix image_index definition
• cc985298 boot: zephyr: Fix IO-based entrance method
• 9ca08817 bootutil: Fix minor issues
• 8a07053d bootutil: Fix log module registration
• 5e1be19f boot: bootutil: write_sz fix
• aed3fb95 docs: Add release note entry for MCUBOOT_BOOT_MAX_ALIGN Zephyr change

Notes on process:

1. The MCUboot update from mcu-tools/mcuboot/main with the SHA used in west.yaml is already synchronized to zephyrproject-rtos/mcuboot/upstream-sync branch, and is available in the Zephyr fork of MCUboot.
2. The [DNM] on this PR should be kept until the PR passes all tests and is accepted.
3. Once the PR passes all tests and gets accepted, the upstream-sync branch should be fast-forward merged to zephyrproject-rtos/mcuboot/main branch and [DNM] should be removed.
4. After the main branch gets updated, this PR does not require further changes and should be merged as is.

[github-actions]

The following west manifest projects have changed revision in this Pull Request:

Name	Old Revision	New Revision	Diff
mcuboot	zephyrproject-rtos/mcuboot@d5b0dcb (main)	zephyrproject-rtos/mcuboot@48b0f6d (upstream-sync)	zephyrproject-rtos/[email protected]

✅ All manifest checks OK

Note: This message is automatically posted and updated by the Manifest GitHub Action.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[nordicjm]

Clearing inactive assignee as also MCUboot maintainer