Update head.html (#394)

Author: imbajin

themes/docsy/layouts/partials/head.html

@@ -2,10 +2,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
 <!-- To handle CSP policy -->
 <meta http-equiv="Content-Security-Policy"
-      content="
-      script-src 'self' 'unsafe-inline' 'unsafe-eval' https://analytics.apache.org https://code.jquery.com https://cdn.jsdelivr.net https://fonts.googleapis.com/;
-      style-src 'self' 'unsafe-inline' https://code.jquery.com https://cdn.jsdelivr.net https://fonts.googleapis.com/;
-">
+      content="script-src 'self'; script-src-elem 'self' https://code.jquery.com https://cdn.jsdelivr.net https://fonts.googleapis.com;">
 {{ hugo.Generator }}
 {{ range .AlternativeOutputFormats -}}
 <link rel="{{ .Rel }}" type="{{ .MediaType.Type }}" href="{{ .Permalink | safeURL }}">