rel: Prepare 2.8.3 release (updated) (#1372)

## Which problem is this PR solving?
Prepares the v2.8.3 release.

## Short description of the changes
- Add change log entry
- Add release notes entry

CHANGELOG.md

@@ -8,6 +8,7 @@
 - fix: Put a limit on the size of sampler keys (#1364) | [Kent Quirk](https://github.com/kentquirk)
 - feat: Record original user agent for spans and logs (#1358) | [Mike Goldsmith](https://github.com/MikeGoldsmith)
 - feat: Make collector health check timeout configurable (#1371) | [Yingrong Zhao](https://github.com/vinozzZ)
+- fix: ConvertNumeric now handles bools (#1336) | [Kent Quirk](https://github.com/kentquirk)
 
 ## 2.8.2 2024-09-13
 

RELEASE_NOTES.md

@@ -4,9 +4,11 @@ While [CHANGELOG.md](./CHANGELOG.md) contains detailed documentation and links t
 
 ## Version 2.8.3
 
-This is a bug fix release.
-It fixes a bug when building sampler key using a very high cardinality field. The fix is to only take the first 100 unique field values.
-It also adds support for Refinery to record the original sender user agent in event data under the key `meta.refinery.incoming_user_agent` and adds a configurtion option for the health check timeout.
+This is a bug fix release and includes the follow changes+~+:
+* Fixes a bug when building sampler key using a very high cardinality field. The fix is to only take the first 100 unique field values.
+* Fixes a bug so the `is_alive` and `is_ready` metrics now report either 0 or 1 correctly.
+
+It also adds support for Refinery to record the original sender user agent in event data under the key `meta.refinery.incoming_user_agent` adds a configurtion option for the health check timeout.
 
 ## Version 2.8.2