fix(docs-infra): keep inline code in links as an atomic inline box

Inline code inside a link renders as a chip with its own background. Text
decoration propagates from the anchor and cannot be cancelled by a descendant,
so with the chip laid out as a regular inline box the link underline is drawn
straight across it.

Lay the chip out as an atomic inline box, which the propagated decoration is not
drawn across. This applies to the link rule only; code outside of links keeps
`display: inline` for wrapping in multiline paragraphs, and the link rule
already sets `white-space: nowrap`.

adev/shared-docs/styles/docs/_code.scss

@@ -87,6 +87,7 @@ $code-font-size: 0.875rem;
       width: 100%;
 
       a:not(.docs-anchor) > & {
+        display: inline-block;
         position: relative;
         padding: 0 0.3rem;
         white-space: nowrap;