Fix greater-than.

Signed-off-by: Flynn <[email protected]>

linkerd.io/content/2.14/tasks/upgrade.md

@@ -44,8 +44,8 @@ restrictions.
 minor version within the same major version. In other words, if you are
 currently running version *2.x.y*, upgrading to *2.x.z*, where *z* is the latest
 minor version for major version *x*, is safe. This is true even if you would
-skip intermediate intermediate minor versions, i.e. it is still safe even if *z
-> y + 1*.
+skip intermediate intermediate minor versions, i.e. it is still safe even if
+*z* > *y + 1*.
 
 **To the next major version**. It is usually safe to upgrade to the latest minor
 version of the *next* major version. In other words, if you are currently