style(api-docs): improve styling for dark mode

Signed-off-by: Benjamin Janssens <benji.janssens@gmail.com>

.changeset/lazy-webs-brake.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-api-docs': patch
+---
+
+Improved styling for dark mode

plugins/api-docs/src/components/AsyncApiDefinitionWidget/AsyncApiDefinition.tsx

@@ -125,9 +125,12 @@ const useStyles = makeStyles(theme => ({
     },
     '& .prose': {
       color: theme.palette.text.secondary,
-      '& h3': {
+      '& h3, code': {
         color: theme.palette.text.primary,
       },
+      '& a': {
+        color: theme.palette.link,
+      },
     },
     '& .bg-gray-100, .bg-gray-200': {
       backgroundColor: theme.palette.background.default,