Restore accessibility check and fix linkcheck target

Author: tarek-y-ismail

.github/workflows/documentation-checks.yaml

@@ -77,14 +77,25 @@ jobs:
           woke-target: woke
           makefile: Makefile
 
+      - name: Accessibility Check
+        id: pa11y-step
+        continue-on-error: true
+        if: success() || failure()
+        uses: canonical/documentation-workflows/pa11y@main
+        with:
+          working-directory: doc/sphinx
+          install-target: install
+          pa11y-target: pa11y
+          makefile: Makefile
+
       - name: Link Check
         id: linkcheck-step
         if: success() || failure()
         uses: canonical/documentation-workflows/linkcheck@main
         with:
           working-directory: doc/sphinx
           install-target: install
-          linkcheck-target: ${{ inputs.linkcheck-target }}
+          linkcheck-target: linkcheck
           makefile: Makefile
 
       - if: ${{ failure() && runner.debug }}