DOC-13347 fix unreadable inline example

Our highlightjs style breaks redocly inline examples, so we ensure it is ignored.

Q: should we instead disable highlightjs for these pages?

Author: osfameron

src/css/base.css

@@ -78,6 +78,11 @@ code {
   color: inherit;
 }
 
+#redoc .hljs-comment,
+#redoc .hljs-meta {
+  color: inherit;
+}
+
 a code {
   color: var(--color-link);
   background-color: transparent;

src/css/doc.css

@@ -114,6 +114,15 @@
   visibility: visible;
 }
 
+.three-column-row h1:hover a.anchor,
+.three-column-row h2:hover a.anchor,
+.three-column-row h3:hover a.anchor,
+.three-column-row h4:hover a.anchor,
+.three-column-row h5:hover a.anchor,
+.three-column-row h6:hover a.anchor {
+  visibility: hidden;
+}
+
 .doc i.fa {
   font-style: normal;
 }