docs: the agent config meta-flake input is the local applied mirror, not forge git+http

config-changes.md § Meta flake, hive-c0re nix comments and the meta.rs/exec.rs
doc comments still described the declared agent-<n> input as a forge-hosted
git+http repo; meta.rs renders git+file://<applied>.

hive-c0re/src/job_queue/exec.rs

@@ -884,7 +884,7 @@ fn parse_agent_input_names(inputs: &[String]) -> Vec<String> {
 /// validating parser every other agent-name wire field in this codebase
 /// goes through, so a name that reaches
 /// [`fast_forward_applied_main`](crate::forge::fast_forward_applied_main) or
-/// a `git+http://.../agent-configs/<name>.git` URL built off it has already
+/// an `agent-configs/<name>` forge URL built off it has already
 /// passed the same bar as one that arrived over a socket. Not just a
 /// helper for [`parse_agent_input_names`]: `run_meta_lock`'s `fanout`
 /// parameter carries pre-computed agent names too, and while today's only