Update release date in CHANGELOG.md (#37934)

* Update CHANGELOG.md

* Fix README.md

sdk/ai/azure-ai-inference/CHANGELOG.md

@@ -1,18 +1,12 @@
 # Release History
 
-## 1.0.0b5 (Unreleased)
+## 1.0.0b5 (2024-10-16)
 
 ### Features Added
 
 * Support for OpenTelemetry tracing. Please find more information in the package [README.md](https:/Azure/azure-sdk-for-python/blob/main/sdk/ai/azure-ai-inference/README.md).
 * When constructing clients using input `credential` of type `AzureKeyCredential`, two HTTP request headers are sent simultaneously for authentication: `Authentication: Beater <key>` and `api-key: <key>` (previously only the first one was sent). This is to support different inference services, removing the need for the application to explicitly specify an additional HTTP request header.
 
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
-
 ## 1.0.0b4 (2024-08-30)
 
 ### Features Added