make deploy script a bit more cross-platform

Author: Rich-Harris

site/scripts/deploy.sh

@@ -4,7 +4,7 @@ git symbolic-ref HEAD refs/heads/gh-pages
 git reset $HEAD
 git rm --cached -rf ..
 cd __sapper__/export
-find -type f | cut -c 3- | xargs -I '{}' sh -c 'git update-index --add --cacheinfo 100644,$(git hash-object -w "{}"),"{}"'
+find . -type f | cut -c 3- | xargs -I '{}' sh -c 'git update-index --add --cacheinfo 100644,$(git hash-object -w "{}"),"{}"'
 git commit -m '[build site]'
 git symbolic-ref HEAD $HEAD
 git reset