docs(tooling): refresh the config comments for 1.2.0

Both configs are already the shapes 1.2.0 documents, so this is comments
only. The oxlint one cited `--print-config` as the check that `extends`
drops `ignorePatterns`; 1.2.0 says that command renders an `extends`
config pre-merge and is not a valid audit of one. The reason survives it:
oxlint has no per-override ignore, which is why `extends` is undocumented
now and why `extendConfig` is what this repo uses.

The oxfmt one notes why `withoutIgnorePatterns` does not apply here —
this changelog is generated by @release-it/conventional-changelog, so the
preset's `**/CHANGELOG.md` ignore is the wanted behaviour.

Claude-Session: https://claude.ai/code/session_01Fe92vvdc4R3F4BDBFoLcw1

Author: GSTJ

oxfmt.config.mts

@@ -1,3 +1,5 @@
-// magic-oxfmt-config 1.1.0 ignores `**/CHANGELOG.md` itself, so the local
-// re-declaration this file used to carry is gone.
+// magic-oxfmt-config ignores `**/CHANGELOG.md` itself, so the local
+// re-declaration this file used to carry is gone. The `withoutIgnorePatterns`
+// opt-out 1.2.0 added is for repos that hand-write their changelog; this one's
+// is generated by @release-it/conventional-changelog, so the default is right.
 export { default } from "magic-oxfmt-config";

oxlint.config.mts

@@ -2,10 +2,11 @@ import { extendConfig } from "magic-oxlint-config";
 import base from "magic-oxlint-config/base";
 
 // `extendConfig` flattens the preset into a single config rather than going
-// through oxlint's `extends`, which still drops `ignorePatterns` on oxlint
-// 1.75.0 + magic-oxlint-config 1.1.0 — verified with `oxlint --print-config`
-// and by linting a probe file under `**/generated/**`. Flattening means there
-// is no re-declared ignore list here to drift from the preset's.
+// through oxlint's `extends`, which is the only other supported shape and
+// cannot carry `ignorePatterns` — oxlint has no per-override ignore, so
+// magic-oxlint-config 1.2.0 stopped documenting `extends` entirely. Flattening
+// carries the ignore list and the preset's `env`/`globals` by construction,
+// with nothing local to drift from the preset.
 export default extendConfig(base, {
   overrides: [
     {