fix(theme): dim color for all text like elements inside blockquotes

this will likely break some other stuff, we can selectively override color for those cases later

closes #3929

src/client/theme-default/styles/components/vp-doc.css

@@ -98,12 +98,12 @@
   border-left: 2px solid var(--vp-c-divider);
   padding-left: 16px;
   transition: border-color 0.5s;
+  color: var(--vp-c-text-2);
 }
 
 .vp-doc blockquote > p {
   margin: 0;
   font-size: 16px;
-  color: var(--vp-c-text-2);
   transition: color 0.5s;
 }