feat: Add support to enable backoff when rate limited by the Github API

Signed-off-by: andrewhibbert <[email protected]>

Author: andrewhibbert

CHANGELOG.md

@@ -81,6 +81,7 @@ Here is an overview of all new **experimental** features:
 - **Elasticsearch Scaler**: Support IgnoreNullValues at Elasticsearch scaler ([#6599](https://github.com/kedacore/keda/pull/6599))
 - **GitHub Scaler**: Add support to use ETag for conditional requests against the Github API ([#6503](https://github.com/kedacore/keda/issues/6503))
 - **GitHub Scaler**: Filter workflows via query parameter for improved queue count accuracy ([#6519](https://github.com/kedacore/keda/pull/6519))
+- **Github Scaler**: Implement backoff when receive rate limit errors ([#6643](https://github.com/kedacore/keda/issues/6643))
 - **IBMMQ Scaler**: Handling StatusNotFound in IBMMQ scaler ([#6472](https://github.com/kedacore/keda/pull/6472))
 - **RabbitMQ Scaler**: Support use of the ‘vhostName’ parameter in the ‘TriggerAuthentication’ resource ([#6369](https://github.com/kedacore/keda/issues/6369))
 - **Selenium Grid**: Add trigger param to set custom capabilities for matching specific Nodes ([#6536](https://github.com/kedacore/keda/issues/6536))