Update license metadata to link to actual `creativeml-openrail-m` license (#10)

- Update license metadata to link to actual `creativeml-openrail-m` license (577f106f970f495a28dcc6ba52de0243d31e51b2)

README.md

@@ -1,5 +1,5 @@
 ---
-license: other
+license: creativeml-openrail-m
 tags:
 - stable-diffusion
 - text-to-image