fix spelling

cspell.json

@@ -27,6 +27,7 @@
     "colocated",
     "colour",
     "combobox",
+    "Commonmark",
     "Composability",
     "Consolas",
     "contenteditable",
@@ -43,6 +44,7 @@
     "dogfood",
     "dropdowns",
     "easings",
+    "endraw",
     "enterkeyhint",
     "eqeqeq",
     "erroneou",

docs/assets/styles/docs.css

@@ -267,7 +267,7 @@ hr {
   margin: calc(var(--docs-content-vertical-spacing) * 2) 0;
 }
 
-/* Blockquotes */
+/* Block quotes */
 blockquote {
   position: relative;
   font-family: var(--sl-font-serif);