Fix relative links in the generated documentation. [skip ci]

Author: andersio

script/gen-docs

@@ -66,6 +66,10 @@ cp ../Logo/PNG/logo-Swift.png ${DOC_PATH}/Logo/PNG/logo-Swift.png
 cp ../Logo/PNG/JoinSlack.png ${DOC_PATH}/Logo/PNG/JoinSlack.png
 cp ../Logo/PNG/Docs.png ${DOC_PATH}/Logo/PNG/Docs.png
 
+# Fix all readme links.
+perl -0777 -i -pe 's/"Documentation\/([a-zA-Z0-9-_]+)\.md/"\L$1\.html/g' ${DOC_PATH}/*.html
+perl -0777 -i -pe 's/"(a-zA-Z0-9-_]+)\.md/"\L$1\.html/g' ${DOC_PATH}/*.html
+
 git add ${DOC_PATH}
 
 # Ensure Jekyll is not running in `docs`.