docs(ci): stop hard-coding hook self-test deps in a comment (#14538)

The step comment claimed a fixed dependency set (jq + git only) for
the whole "Claude hook guard self-tests" step, but the step discovers
its matrices by glob (`find .claude/hooks -type f -name
'*.selftest.sh'`), so a new matrix can legitimately need more than the
two original ones did -- and one already does
(guard-governed-enqueue.selftest.sh needs `node` for real, to run its
two predicates). The comment never noticed; nothing catches that this
prose fell out of date, since check:step-collectors cannot see this
block (already admitted a few lines up).

Rewrite the dependency sentence to say what is true of the STEP
itself (jq + git, both already relied on bare elsewhere in this repo)
plus whatever each discovered matrix declares in its own header --
because discovery is by glob, a matrix needing more must say so
there, not here. Drop the stale "~2 s measured" figure along with it.

No other line moves: step name, run: script, find discovery, and the
rest of the "Hermetic by construction" paragraph are untouched.

Co-authored-by: Claude <noreply@anthropic.com>

Author: claude[bot]

.github/workflows/lint.yml

@@ -1343,9 +1343,12 @@ jobs:
       # own git repo and linked worktree under $TMPDIR, and both were re-run
       # from a primary checkout, a detached HEAD and a non-repo cwd with
       # identical results, so neither this checkout's depth nor its branch is an
-      # input. Needs `jq` and `git` and nothing else — no pnpm, no node, no
-      # build, no network (`jq` is in the runner image and is already relied on
-      # bare by cut-rc.yml and release.yml). ~2 s measured.
+      # input. This step itself needs only `jq` and `git` (both in the runner
+      # image; `jq` is already relied on bare by cut-rc.yml and release.yml),
+      # plus whatever each discovered matrix declares in its own header —
+      # discovery above is by glob, so a matrix needing more (node, pnpm, a
+      # built tree, a generator) must say so there; this comment is not the
+      # place to enumerate it.
       - name: Claude hook guard self-tests (worktree-first · stash ban)
         run: |
           # Tolerate-and-collect (#10814) — see the note above this step. Each