DNM: manifest: update sdk-zephyr

[HaavardRei]

Updates sdk-zephyr manifest to test net_buf reversal in CI.

[NordicBuilder]

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

Name	Old Revision	New Revision	Diff
zephyr	nrfconnect/sdk-zephyr@76a46cb (main)	nrfconnect/sdk-zephyr#2440	nrfconnect/sdk-zephyr#2440/files

⛔ DNM label due to: 1 project with PR revision

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

[NordicBuilder]

CI Information

^{To view the history of this post, clich the 'edited' button above}
Build number: 4

Inputs:

Sources:

more details

Github labels

Enabled	Name	Description
	ci-disabled	Disable the ci execution
	ci-all-test	Run all of ci, no test spec filtering will be done
	ci-force-downstream	Force execution of downstream even if twister fails
	ci-run-twister	Force run twister
	ci-run-zephyr-twister	Force run zephyr twister

List of changed files detected by CI (0)

Outputs:

Toolchain

Version:
Build docker image:

Test Spec & Results: ✅ Success; ❌ Failure; 🟠 Queued; 🟡 Progress; ◻️ Skipped; ⚠️ Quarantine

• ❌ Toolchain
• ❌ Build twister
• ❌ Integration tests

Note: This message is automatically posted and updated by the CI

[NordicBuilder]

You can find the documentation preview for this PR at this link.

Note: This comment is automatically posted by the Documentation Publish GitHub Action.

[NordicBuilder]

Memory footprint analysis revealed the following potential issues

sample.matter.template.release[nrf7002dk/nrf5340/cpuapp]: High ROM usage: 821098[B] - link (cc: @kkasperczyk-no @ArekBalysNordic @markaj-nordic)
sample.matter.template.debug[nrf7002dk/nrf5340/cpuapp]: High ROM usage: 912178[B] - link (cc: @kkasperczyk-no @ArekBalysNordic @markaj-nordic)

Note: This message is automatically posted and updated by the CI (latest/sdk-nrf/PR-20010/3)

[HaavardRei]

CI passed