Apply suggestions from code review

Co-authored-by: Taylor C <[email protected]>

Author: tcard

cmd/mimir/help-all.txt.tmpl

@@ -858,7 +858,7 @@ Usage of ./cmd/mimir/mimir:
   -common.client-cluster-validation.label string
     	[experimental] Primary cluster validation label.
   -common.instrument-reference-leaks-pct float
-    	[experimental] Percentage of buffers from pools to instrument for reference leaks. 0 to disable.
+    	[experimental] Percentage of buffers from pools to instrument for reference leaks. Set to 0 to disable.
   -common.storage.azure.account-key string
     	Azure storage account key. If unset, Azure managed identities will be used for authentication instead.
   -common.storage.azure.account-name string

docs/sources/mimir/configure/about-versioning.md

@@ -252,8 +252,8 @@ The following features are currently experimental:
     - The cluster validation label of all gRPC clients can be configured via `-common.client-cluster-validation.label`.
     - Requests with invalid cluster validation labels are tracked via the `cortex_client_invalid_cluster_validation_label_requests_total` metric.
 - Common
-  - Instrument a fraction of pooled objects for references that outlive their lifetime
-    - Only implemented for objects embedding `mimirpb.BufferHolder` so far.
+  - Instrument a fraction of pooled objects for references that outlive their lifetime.
+    - Only implemented for objects embedding `mimirpb.BufferHolder`.
     - Flag: `-common.instrument-reference-leaks-pct`
 - Preferred available zone for querying ingesters and store-gateways
   - `-querier.prefer-availability-zone`