doc: record release-all-missing.yml and the job-level matrix fix.

The two newest changes were not in CHANGELOG-fork.md: the release-all-missing
workflow with the platforms filter, and the fix for that filter being written
as a job-level `if:`, which GitHub will not load because `matrix` is not
available there.

Both entries link their own commit, and every commit link in the file resolves
from HEAD.

Thanks to xet7 !

doc: add CHANGELOG-fork.md, what this fork adds and why

Upstream's CHANGELOG.md is upstream's, and appending to it would mix the two
histories and conflict on every merge. This is a separate file for the fork's
own changes, so what wekan/node adds on top of nodejs/node can be read without
running git log, and so a reader can tell at a glance which platforms are built
and which are deliberately not.

Every entry links its commit. The base is recorded as an upstream commit link
too: v24.18.1, which is the tip of nodejs/node v24.x, so the fork carries no
upstream backlog at the time of writing.

It also records the two places where this fork touches SHIPPED source rather
than build configuration - the zlib SIMD flags and the V8 template
disambiguator - because those are the ones that matter when the base is next
moved forward.

Thanks to xet7 !

2026-07-08 Node.js v26.5.0 (Current) Release

Git-EVTag-v0-SHA512: d3379a4a849c189c981d2e2565d9446d41ba790271b29d5397a1de303dc408c691ef957f3266c9f003104482acd2a90f78729eca863e73f9cca1122df799f3cf

2026-06-24 Node.js v26.4.0 (Current) Release

Git-EVTag-v0-SHA512: 62586bbe519bfbae5f2e1b5233921468af8c8b649ffe340e6fbb9b728b94d52f724b20d730cd78f3500d527813d3e4969957c6534477b6cb304f6dd531e3f750

2026-06-23 Node.js v24.18.0 Krypton (LTS) Release

Git-EVTag-v0-SHA512: 74ea5caa615fb5430563ee27346ae5d125eb0d98d630ed854a976a02d5089d272269711a80b08877967c0f0ce1b964dcf7ba5ff85e2e3622a8ca42b0a8d509ca

2026-06-23 Node.js v22.23.1 Jod (LTS) Release

Git-EVTag-v0-SHA512: 9297d84c778920e33b4db9ded1bc37e4b8b84f6478b08226d6439d6b7606c4b93aaa59fa0e6086e5748de6264c0c0af41d3386b8eaed51b856a627c3216d1fbd

2026-06-18 Node.js v26.3.1 (Current) Release

Git-EVTag-v0-SHA512: ab01fa8af240cfaed4f0068da8cb4377da05c57ef302272e518f394abf7ccbcef675955ecefbd4e3412b0bca00ea7fbb1ae79456e6b522bc7f5ee2a34a1630a4

2026-06-18 Node.js v24.17.0 Krypton (LTS) Release

Git-EVTag-v0-SHA512: f54522ee78d0b33417f71c125f489e2fb2ac6f0d8ece81c7048a2b29fdb92de79d35321dc0fb7343299e5ac3cb6e95946ad21e53479fb8e24737613f759a3837

2026-06-18 Node.js v22.23.0 Jod (LTS) Release

Git-EVTag-v0-SHA512: 014c6a100cdd917d58246214bf4015b0aff48c4778f6b7044a041ff2bbfa7a6d7111c287ee0236ec65c7ad1f36c88db822ae696cbadfec3efae71a017ea5ca33

2026-06-01 Node.js v26.3.0 (Current) Release

Git-EVTag-v0-SHA512: 4e276be7e5d6fc133fc299508c94f0ad0f35eb7e619c6c1973bc6b8f905adc1a483de2937154eae9243f73ea9a6aeac6abdbd953c81dc91bfc38c3d5c48a4844