[DOCS] Fix several breaking changes

docs/reference/migration/migrate_8_0/mappings.asciidoc

@@ -64,7 +64,7 @@ Disabling _field_names is not necessary because it no longer carries a large ind
 ====
 
 [[mapping-boosts]]
-.The `boost` parameter on field mappings has been removed
+.The `boost` parameter on field mappings has been removed.
 [%collapsible]
 ====
 *Details* +
@@ -80,7 +80,7 @@ directly on queries instead.
 ====
 
 //tag::notable-breaking-changes[]
-.Java-time date formats replace joda-time formats
+.Java-time date formats replace joda-time formats.
 [%collapsible]
 ====
 *Details* +
@@ -97,7 +97,7 @@ time migration guide].
 // end::notable-breaking-changes[]
 
 [[geo-shape-strategy]]
-.The `strategy` parameter on `geo_shape` mappings now rejects unknown strategies
+.The `strategy` parameter on `geo_shape` mappings now rejects unknown strategies.
 [%collapsible]
 ====
 *Details* +

docs/reference/migration/migrate_8_0/settings.asciidoc

@@ -201,7 +201,7 @@ If you would like to use wildcard patterns for destructive actions, set
 cluster settings>> API.
 ====
 
-.Legacy role settings are removed
+.Legacy role settings have been removed.
 [%collapsible]
 ====
 *Details* +

docs/reference/migration/migrate_8_0/snapshots.asciidoc

@@ -131,15 +131,13 @@ Discontinue use of the `settings` parameter in restore
 snapshot request. Requests that include these parameters will return an error.
 ====
 
-.Repository Stats API is deprecated
+.The repository stats API has been removed.
 [%collapsible]
 ====
 *Details* +
-The Repository Stats API has been introduced in 7.8.0 as an experimental API
-and was never released. This API is superseded by the <<repositories-metering-apis,Repositories Metering APIs>>
-added in 7.10.0 which should be used instead. The Repository Stats API is
-deprecated starting 7.10.0 and will be removed in 8.0.0.
+The repository stats API has been removed. We deprecated this experimental API
+in 7.10.0. 
 
 *Impact* +
-Use the <<repositories-metering-apis,Repositories Metering APIs>>.
+Use the <<repositories-metering-apis,repositories metering APIs>> instead.
 ====