Fix typo error

Author: int32bit

README.md

@@ -270,7 +270,7 @@ Plugin 'octol/vim-cpp-enhanced-highlight'
 Plugin 'nathanaelkane/vim-indent-guides'
 Plugin 'derekwyatt/vim-fswitch'
 Plugin 'kshenoy/vim-signature'
-Plugin 'vim-scripts/BOOKMARKS—Mark-and-Highlight-Full-Lines'
+Plugin 'vim-scripts/BOOKMARKS--Mark-and-Highlight-Full-Lines'
 Plugin 'majutsushi/tagbar'
 Plugin 'vim-scripts/indexer.tar.gz'
 Plugin 'vim-scripts/DfrankUtil'