btrfs-progs: tests: fix filename typo in fsck/052 compex -> complex

Codespell discovered a typo in tests that's actually a bug in filename
that is supposed to be created and written to.

=== Do not change lines below ===
{
 "chain": [],
 "cmd": "git-sedi compex complex",
 "exit": 0,
 "extra_inputs": [],
 "inputs": [],
 "outputs": [],
 "pwd": "."
}
^^^ Do not change lines above ^^^

Pull-request: #846
Author: Yaroslav Halchenko <debian@onerussian.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Author: yarikoptic

tests/fsck-tests/052-init-csum-tree/test.sh

@@ -43,7 +43,7 @@ run_check $SUDO_HELPER fallocate -p -o 4096 -l 4096 "$TEST_MNT/regular_with_hole
 
 # And the most complex one, preallocated, written, then hole
 run_check $SUDO_HELPER fallocate  -l 8192 "$TEST_MNT/complex"
-run_check $SUDO_HELPER dd if=/dev/urandom of="$TEST_MNT/compex" \
+run_check $SUDO_HELPER dd if=/dev/urandom of="$TEST_MNT/complex" \
 	bs=4k count=1 conv=notrunc status=noxfer > /dev/null 2>&1
 sync
 run_check $SUDO_HELPER fallocate -p -l 4096 "$TEST_MNT/regular_with_holes"