docs(nns): Updated changelogs for Lifelife, Registry, and Cycles Minting canisters.

[daniel-wong-dfinity-org-twin]

Proposals:

• Lifeline: 142804
• Registry: 142805
• Cycles Minting: 142806

Just changelogs -> no code change -> no behavior change.

[zeropath-ai]

✅ No security or compliance issues detected. Reviewed everything up to a742976.

Security Overview

• 🔎 Scanned files: 5 changed file(s)
• 🔗 Scan Link: https://zeropath.com/app/repositories/f975f1a5-0a47-4a3b-b7f0-a55609e90390?scanId=bcdc1281-1802-4a80-9af0-42f9465f1f15&codeScanTypes=PrScan&tab=issues

Detected Code Changes

Change Type	Relevant files
Enhancement	► rs/nns/handlers/lifeline/CHANGELOG.md       ## Changed       * Compile the lifeline canister with the latest Motoko compiler (1.11.0) (compared to compiling with 0.16.3 before).
Enhancement	► rs/nns/cmc/CHANGELOG.md       # 2026-03-13: Proposal 142806       http://dashboard.internetcomputer.org/proposal/142806       Just a maintenance release, i.e. no new features or fixes. This upgrade just makes       sure that the code we have in production is not too far behind what's in master.
Enhancement	► rs/registry/canister/CHANGELOG.md       # 2026-07-10: Proposal 142805       http://dashboard.internetcomputer.org/proposal/142805       ## Changed       * delete_subnet may now delete any non-System subnet, lifting the previous        restriction to CloudEngine subnets. Authorization by subnet type:        System subnets (e.g. the NNS) may never be deleted; the engine controller        canister may only delete CloudEngine subnets; governance may delete any        non-System subnet.