Update CHANGELOG.md

CHANGELOG.md

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 * [FEATURE] Alertmanager: Added `-alertmanager.max-silences-count` and `-alertmanager.max-silence-size-bytes` to set limits on per tenant silences. Disabled by default. #6898
 * [FEATURE] Ingester: add experimental support for the server-side circuit breakers when writing to and reading from ingesters. This can be enabled using `-ingester.circuit-breaker.enabled` option. Further `-ingester.circuit-breaker.*` options for configuring circuit-breaker are available. Added metrics `cortex_ingester_circuit_breaker_results_total`,  `cortex_ingester_circuit_breaker_transitions_total` and `cortex_ingester_circuit_breaker_current_state`. #8180 #8285
 * [FEATURE] Distributor, ingester: add new setting `-validation.past-grace-period` to limit how old (based on the wall clock minus OOO window) the ingested samples can be. The default 0 value disables this limit. #8262
+* [ENHANCEMENT] Documentation: added Azure object store workload identity example configuration
 * [ENHANCEMENT] Distributor: add metrics `cortex_distributor_samples_per_request` and `cortex_distributor_exemplars_per_request` to track samples/exemplars per request. #8265
 * [ENHANCEMENT] Reduced memory allocations in functions used to propagate contextual information between gRPC calls. #7529
 * [ENHANCEMENT] Distributor: add experimental limit for exemplars per series per request, enabled with `-distributor.max-exemplars-per-series-per-request`, the number of discarded exemplars are tracked with `cortex_discarded_exemplars_total{reason="too_many_exemplars_per_series_per_request"}` #7989 #8010