tests: Fix summary for logically bound tmt test

It was copied from the local-upgrade test.

Signed-off-by: Chris Kyrouac <[email protected]>

Author: ckyrouac

plans/test-21-logically-bound.fmf

@@ -4,7 +4,7 @@ provision:
   # Generated by make test-tmt
   image: file://./target/testvm/disk.qcow2
   disk: 20
-summary: Execute local upgrade tests
+summary: Execute logically bound images tests
 execute:
   how: tmt
   # We avoid writing nontrivial shell script as a general rule,