feat(js): add enableLongAnimationFrame to javascript docs (#10862)

* feat(js): add enableLongAnimationFrame

* typo

* Update docs/platforms/javascript/common/tracing/instrumentation/automatic-instrumentation.mdx

Co-authored-by: Liza Mock <[email protected]>

---------

Co-authored-by: Liza Mock <[email protected]>

Author: KevinL10

docs/platforms/javascript/common/tracing/instrumentation/automatic-instrumentation.mdx

@@ -131,6 +131,15 @@ This option determines whether spans for long tasks automatically get created.
 
 The default is `true`.
 
+### enableLongAnimationFrame
+<Note>
+The `enableLongAnimationFrame` option requires SDK [version 8.18.0](https://github.com/getsentry/sentry-javascript/releases/tag/8.18.0) or higher.
+</Note>
+
+This option determines whether spans for long animation frames get created automatically. If both `enableLongAnimationFrame` and `enableLongTask` are enabled, Sentry will send long animation frames and fallback to long tasks (if long animation frames aren't supported by the browser).
+
+The default is `false`.
+
 ### enableInp
 
 <Note>