Add contents to 7146 changelog (#7165)

Signed-off-by: SungJin1212 <tjdwls1201@gmail.com>

Author: SungJin1212

CHANGELOG.md

@@ -2,7 +2,10 @@
 
 ## master / unreleased
 
-* [CHANGE] Querier: Renamed `cortex_parquet_queryable_cache_*` metrics to `cortex_parquet_cache_*`. #7146
+* [CHANGE] Querier: Refactored parquet cache configuration naming. #7146
+  * Metrics: Renamed `cortex_parquet_queryable_cache_*` to `cortex_parquet_cache_*`.
+  * Flags: Renamed `-querier.parquet-queryable-shard-cache-size` to `-querier.parquet-shard-cache-size` and `-querier.parquet-queryable-shard-cache-ttl` to `-querier.parquet-shard-cache-ttl`.
+  * Config: Renamed `parquet_queryable_shard_cache_size` to `parquet_shard_cache_size` and `parquet_queryable_shard_cache_ttl` to `parquet_shard_cache_ttl`.
 * [FEATURE] StoreGateway: Introduces a new parquet mode. #7046
 * [FEATURE] Distributor: Add a per-tenant flag `-distributor.enable-type-and-unit-labels` that enables adding `__unit__` and `__type__` labels for remote write v2 and OTLP requests. This is a breaking change; the `-distributor.otlp.enable-type-and-unit-labels` flag is now deprecated, operates as a no-op, and has been consolidated into this new flag. #7077
 * [ENHANCEMENT] StoreGateway: Add tracings to parquet mode. #7125