fix: use auto image aspect ratio in text editor (#9953)

Signed-off-by: Alexander Onnikov <[email protected]>

Author: aonnikov

packages/theme/styles/_text-editor.scss

@@ -303,6 +303,7 @@
 .text-editor-image-container {
   img {
     max-width: 100%;
+    height: auto;
   }
 }