Update from github-actions[bot] running command 'prdoc'

Author: github-actions[bot]

prdoc/pr_10359.prdoc

@@ -0,0 +1,11 @@
+title: Remove invulnerables form staking-async
+doc:
+- audience: Todo
+  description: "The \"staking-async\" pallet has inherited the list of invulnerable\
+    \ validators from the \"staking\" pallet, but these are no longer used. We can\
+    \ therefore remove them, together with additional clean-up.\r\n"
+crates:
+- name: asset-hub-westend-runtime
+  bump: major
+- name: pallet-staking-async
+  bump: major