Update xml/reference-transactional-update-usage.xml

Co-authored-by: Daria Vladykina <[email protected]>

xml/reference-transactional-update-usage.xml

@@ -28,8 +28,8 @@
       The &tr-up-shell; command opens a shell in the transactional-update
       environment. In the shell, you can enter almost any Linux command to make
       changes to the file system, for example, install multiple packages with
-      the <command>zypper</command> or perform changes to files that are part
-      of the read-only file system. You can also verify that the changes you
+      the <command>zypper</command> command or perform changes to files that
+      are part of the read-only file system. You can also verify that the changes you
       previously made with the &tr-up; command are correct.
     </para>
     <important>