docs: INSTALL.md/EVALS.md ziehen nach, dass version notes den Feed mitfragt (#107)

Nachzug aus der Abschlussphase. INSTALL.md behauptete, version check sei der
einzige Befehl, der ins Netz geht - seit 6.1.0-beta.4 sind es zwei. EVALS.md
nennt version notes als dritten Nutzer der Stamp-Unterscheidung
Instanz/Dev-Checkout, die genau diese Fallback-Grenze traegt.

Prosa-only, ausserhalb des CI-Version-Gates, deshalb kein Bump.

Files changed:
- EVALS.md
- INSTALL.md

EVALS.md

@@ -202,8 +202,8 @@ same question the same way:
 | Git clone of this repo (dev checkout) | **on** (opt-out) | No `.wikitool-release.json` |
 | `dist export` tarball (a distributed instance) | **off** (opt-in) | `.wikitool-release.json` present |
 
-The form is read off `.wikitool-release.json`, the same stamp `version check` and `dist upgrade`
-already use to tell a distribution from the repo it came from - present means an operator never
+The form is read off `.wikitool-release.json`, the same stamp `version check`, `dist upgrade` and
+`version notes` already use to tell a distribution from the repo it came from - present means an operator never
 asked for telemetry, absent means this is the dev checkout the stack ships from, where the traces
 are its own measuring instrument (the rest of this file). A private instance
 (`instructions/private-instance.md`) is a git clone of an *export*, so it carries the stamp and