Fix SRI hashes.

_config.yml

@@ -48,9 +48,9 @@ jobs:             https://jobs.getbootstrap.com
 cdn:
   # See https://www.srihash.org for info on how to generate the hashes
   css:            https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css
-  css_hash:       "sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ"
+  css_hash:       "sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M"
   js:             https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js
-  js_hash:        "sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn"
+  js_hash:        "sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1"
   jquery:         https://code.jquery.com/jquery-3.2.1.slim.min.js
   jquery_hash:    "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
   popper:         https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js