package/python-flask-smorest: fix formatting in hash file

Fixes:

package/python-flask-smorest/python-flask-smorest.hash:5: separation does not match expectation (http://nightly.buildroot.org/#adding-packages-hash)

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/python-flask-smorest/python-flask-smorest.hash

@@ -2,4 +2,4 @@
 md5  1dad52f26c59ca2dcaf0c5d109879605  flask-smorest-0.40.0.tar.gz
 sha256  9b46b4937ccf78702d99fed8cfd1cd5c37608ddefd65ff16a86d1ad5c7f7d8c0  flask-smorest-0.40.0.tar.gz
 # Locally computed sha256 checksums
-sha256	40999ea1d9c1b8202fa44f8e6849a557e22df892481e067abf999879064b9521  LICENSE
+sha256  40999ea1d9c1b8202fa44f8e6849a557e22df892481e067abf999879064b9521  LICENSE