enable pointer events for element that has new classname in newer versions of mkdocs-material

Signed-off-by: Morgan Bentell <mbentell@spotify.com>

.changeset/great-trains-jam.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-techdocs': patch
+---
+
+Fix bug that caused next and previous links not to work with certain versions of mkdocs-material

plugins/techdocs/src/reader/transformers/styles/rules/layout.ts

@@ -108,7 +108,7 @@ export default ({ theme, sidebar }: RuleOptions) => `
   pointer-events: none;
 }
 
-.md-footer-nav__link {
+.md-footer-nav__link, .md-footer__link {
   pointer-events: all;
 }