bugfix hyperlink to EastAsianWidth.txt (#115)

Author: jquast

docs/specs.rst

@@ -75,5 +75,5 @@ Any character in sequence with `U+FE0F`_ (Variation Selector 16) defined by
 .. _`U+D7FF`: https://codepoints.net/U+D7FF
 .. _`U+FE0F`: https://codepoints.net/U+FE0F
 .. _`DerivedGeneralCategory.txt`: https://www.unicode.org/Public/UCD/latest/ucd/extracted/DerivedGeneralCategory.txt
-.. _`EastAsianWidth.txt`: https://www.unicode.org/Public/UCD/latest/ucd/EastAsianWidth.txt`
+.. _`EastAsianWidth.txt`: https://www.unicode.org/Public/UCD/latest/ucd/EastAsianWidth.txt
 .. _`emoji-variation-sequences.txt`: https://www.unicode.org/Public/UCD/latest/ucd/emoji/emoji-variation-sequences.txt