Add syntax highlighting for bash.

src/context/src_block.rs

@@ -56,6 +56,13 @@ render!(RenderSrcBlock, ISrcBlock, original, render_context, {
         })
         .collect();
     match original.language.as_ref().map(String::as_str) {
+        Some("bash") => {
+            render_context
+                .dependency_manager
+                .lock()
+                .unwrap()
+                .include_css("language_bash.css")?;
+        }
         Some("nix") => {
             render_context
                 .dependency_manager