fix(record): the jobs precedence is documented in docs/04-mcpp-toml.md

The comment and the analysis both named `docs/03-configuration.md`, which
does not exist -- caught by this repository's own docs check, which asserts
that every document a file names is present.

Author: speak-agent

.agents/docs/2026-09-11-six-open-issues-analysis.md

@@ -321,7 +321,7 @@ default. Someone who sets a machine-wide number almost certainly means it there
 too -- a test runner at 10 concurrent processes has the same memory shape as a
 compile at 10 -- so it should apply, and be documented as applying. What must
 not happen is for it to apply silently: this is a second behaviour under one
-key, and `docs/03-configuration.md` has to say so.
+key, and `docs/04-mcpp-toml.md` has to say so.
 
 **`default_backend` should be removed.** `BackendKind` has `Ninja` and `Native`
 (`src/build/backend.cppm:10`) and `src/build/` contains one backend

src/build/execute.cppm

@@ -2180,7 +2180,7 @@ export int run_tests(std::span<const std::string> passthrough,
         // decision rather than an inheritance. A test runner at ten concurrent
         // processes has the same memory shape as a compile at ten, so someone
         // who set a machine-wide number almost certainly meant it for both;
-        // `docs/03-configuration.md` says so, because one key with two
+        // `docs/04-mcpp-toml.md` says so, because one key with two
         // behaviours has to be stated. The fallback below is unchanged:
         // absent, this path uses the whole machine rather than the backend's
         // default, since there is no backend to defer to.