docs(runtime): align docs with hashed runtime asset

Replace fixed /hemx.js wording with helper-provided runtime asset language so docs match hemx-axum runtime_js_path deployment boundaries.

req: axum_integration/005

req: examples/001

docs/versioning.md

@@ -101,7 +101,8 @@ include upgrade notes with this shape:
 
 ### Required actions
 - Regenerate generated code with `cargo check` or your normal build.
-- Deploy server and `/hemx.js` from the same release if ABI/fingerprint changed.
+- Deploy server and the helper-provided runtime asset from the same release if
+  ABI/fingerprint changed.
 - Update any renamed helpers or advanced calls listed below.
 
 ### Compatibility behavior
@@ -135,8 +136,8 @@ Before tagging a v1-compatible release:
 - Any incompatible generated ABI/runtime change bumps the relevant ABI/fingerprint
   inputs and has tests for fail-closed behavior. req: abi/005
 - Advanced APIs touched by the release are still named as escape hatches in docs.
-- Upgrade notes state whether users must regenerate code, redeploy `/hemx.js`, or
-  change app code.
+- Upgrade notes state whether users must regenerate code, redeploy the
+  helper-provided runtime asset, or change app code.
 
 ## Policy for v1 cutover