Update to new shared docs repo

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "docs/.shared"]
 	path = docs/.shared
-	url = https://github.com/amphp/website-shared
+	url = https://github.com/amphp/amphp.github.io

docs/.shared

@@ -1 +1 @@
-Subproject commit 4959bcbd1c7c4d6c8960773ed9caa371faee3d49
+Subproject commit 670b9567d1cf0f62efb6a2064d6e8106eec50cb8

docs/_config.yml

@@ -4,9 +4,10 @@ kramdown:
 
 baseurl: "/byte-stream"
 layouts_dir: ".shared/layout"
+includes_dir: ".shared/includes"
 
 exclude: ["Gemfile", "Gemfile.lock", "README.md", "vendor"]
-include: [".shared"]
+safe: true
 
 repository: amphp/byte-stream
 gems:
@@ -20,7 +21,7 @@ defaults:
    values:
      layout: "docs"
 
-asset_path: "/byte-stream/.shared/asset"
+shared_asset_path: "/byte-stream/asset"
 
 navigation:
  - resource-streams

docs/asset

@@ -0,0 +1 @@
+.shared/asset