expat.spec: Fix list of doc filenames
expat.spec: Fix list of doc filenames

Related commits:
- AUTHORS, Changes, changelog:
  - 2cb09ae4da6c89f35be55a54f1b59f0327d9dbb3
  - 2cb09ae4da6c89f35be55a54f1b59f0327d9dbb3
- MANIFEST: d4390f34f3890e969137605adcbac4ed571e00e4
- README: da70f7af4daad5a410dac3cc4db5e1796ac5a2d8

libexpat/libexpat,libexpat/libexpat,libexpat/libexpat,libexpat/libexpat,libexpat/libexpat,libexpat/libexpat