package/python-webargs: fix formatting in hash file

Fixes:

package/python-webargs/python-webargs.hash:2: separation does not match expectation (http://nightly.buildroot.org/#adding-packages-hash)

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

package/python-webargs/python-webargs.hash

@@ -1,5 +1,5 @@
 # md5, sha256 from https://pypi.org/pypi/webargs/json
-md5   9fff29294a5db748eca791da2b93e370  webargs-8.2.0.tar.gz
+md5  9fff29294a5db748eca791da2b93e370  webargs-8.2.0.tar.gz
 sha256  99d68940c452e07726485a15fef43f12f8ae6c0c5b391bcba76065d4527fb85d  webargs-8.2.0.tar.gz
 # Locally computed sha256 checksums
 sha256  5973e5dcc20b65e4eb4b4acdf273bb78a18522914ab626f496f1b070f7e6294d  LICENSE