Adjust copy settings versions

This commit adjusts the versions on the copy settings behavior now
that the default behavior is configured in 7.0.0.

Author: jasontedor

docs/reference/indices/shrink-index.asciidoc

@@ -135,10 +135,10 @@ and `index.sort` settings, index settings on the source index are not copied
 during a shrink operation. With the exception of non-copyable settings, settings
 from the source index can be copied to the target index by adding the URL
 parameter `copy_settings=true` to the request. Note that `copy_settings` can not
-be set to `false`. The parameter `copy_settings` will be removed in 9.0.0
+be set to `false`. The parameter `copy_settings` will be removed in 8.0.0
 
 deprecated[6.4.0, not copying settings is deprecated, copying settings will be
-the default behavior in 8.x]
+the default behavior in 7.x]
 
 [float]
 === Monitoring the shrink process

docs/reference/indices/split-index.asciidoc

@@ -182,10 +182,10 @@ and `index.sort` settings, index settings on the source index are not copied
 during a split operation. With the exception of non-copyable settings, settings
 from the source index can be copied to the target index by adding the URL
 parameter `copy_settings=true` to the request. Note that `copy_settings` can not
-be set to `false`. The parameter `copy_settings` will be removed in 9.0.0
+be set to `false`. The parameter `copy_settings` will be removed in 8.0.0
 
 deprecated[6.4.0, not copying settings is deprecated, copying settings will be
-the default behavior in 8.x]
+the default behavior in 7.x]
 
 [float]
 === Monitoring the split process