ruffle: update to ruffle 2023-05-13 release, later versions interfere… (#181)

* ruffle:
- switch to ruffle 2023-05-13 release, later versions interfere with loading, it seems (see #180)
fixes #180

* add ruffle toggling options
- disable by default in embed mode, can be enabled with 'useruffle' attr
- enable by default in standalone, can be disabled with 'skipruffle' attr
- fixes #182

* update CHANGES for 1.8.1

docs/embedding.md

@@ -131,6 +131,7 @@ The `<replay-web-page>` tag is a web component that supports a number of additio
 | `newWindowBase` | set base replay URL loaded when a page opens a new window, defaults to `https://replayweb.page/` if `deepLink` not enabled, otherwise, to current page with new link. |
 | `requireSubdomainIframe` | if set, will only load embed in an iframe loaded from a subdomain, for increased origin isolation. |
 | `loading="eager"` | if set, will load the entire WACZ file at once (regardless of size), and not attempt on-demand range request loading. |
+| `useRuffle` | if set, will enable include Ruffle Flash emulator. Must include the `ruffle/` directory in `replayBase`. |
 
 ### Versioning