iotests: Fix typo in 026

s/refcout/refcount/

CC: qemu-trivial@nongnu.org
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

tests/qemu-iotests/026

@@ -119,7 +119,7 @@ done
 
 
 echo
-echo === Refcout table growth tests ===
+echo === Refcount table growth tests ===
 echo
 CLUSTER_SIZE=512
 

tests/qemu-iotests/026.out

@@ -462,7 +462,7 @@ Event: cluster_alloc; errno: 28; imm: off; once: off; write -b
 write failed: No space left on device
 No errors were found on the image.
 
-=== Refcout table growth tests ===
+=== Refcount table growth tests ===
 
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
 

tests/qemu-iotests/026.out.nocache

@@ -470,7 +470,7 @@ Event: cluster_alloc; errno: 28; imm: off; once: off; write -b
 write failed: No space left on device
 No errors were found on the image.
 
-=== Refcout table growth tests ===
+=== Refcount table growth tests ===
 
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824