ci(release): improve release-please configuration (#1360)

Author: erikgb

release-please-config.json

@@ -1,12 +1,16 @@
 {
-  "release-type": "go",
+  "always-update": true,
   "bump-minor-pre-major": true,
-  "bump-patch-for-minor-pre-major": true,
   "extra-files": [
     "kustomization.yaml",
     "README.md"
   ],
   "packages": {
     ".": {}
-  }
+  },
+  "plugins": [
+    "sentence-case"
+  ],
+  "release-type": "go",
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json"
 }