localization: change translation for Text.CommitCM.SquashCommitsSinceThis (#408)

* Thanks to @thomaschampagne

Author: love-linger

src/Resources/Locales/en_US.axaml

@@ -107,7 +107,7 @@
   <x:String x:Key="Text.CommitCM.Reword" xml:space="preserve">Reword</x:String>
   <x:String x:Key="Text.CommitCM.SaveAsPatch" xml:space="preserve">Save as Patch...</x:String>
   <x:String x:Key="Text.CommitCM.Squash" xml:space="preserve">Squash Into Parent</x:String>
-  <x:String x:Key="Text.CommitCM.SquashCommitsSinceThis" xml:space="preserve">Squash Commits since Here</x:String>
+  <x:String x:Key="Text.CommitCM.SquashCommitsSinceThis" xml:space="preserve">Squash Child Commits to Here</x:String>
   <x:String x:Key="Text.CommitDetail.Changes" xml:space="preserve">CHANGES</x:String>
   <x:String x:Key="Text.CommitDetail.Changes.Search" xml:space="preserve">Search Changes...</x:String>
   <x:String x:Key="Text.CommitDetail.Files" xml:space="preserve">FILES</x:String>