chore: anchor release-please to this release cycle's base

last-release-sha records the merge parent so the squash merge itself lands the next cycle's boundary on main: version tags live on packaged commits that are not on main, so release-please cannot find the boundary by tag.

Author: settings-as-code-release

release-please-config.json

@@ -3,7 +3,7 @@
   "bump-minor-pre-major": true,
   "bump-patch-for-minor-pre-major": true,
   "include-component-in-tag": false,
-  "last-release-sha": "046adf3b24454f26f569850630809bcf481f8b84",
+  "last-release-sha": "e6897d81d3306fe4447c9e5b0c003bff2c3e8d0d",
   "packages": {
     ".": {
       "release-type": "simple",