chore(deps-dev): Bump @antora/lunr-extension (#708)

---
updated-dependencies:
- dependency-name: "@antora/lunr-extension"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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package.json

@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "@antora/cli": "^3.1.10",
-    "@antora/lunr-extension": "^1.0.0-alpha.9",
+    "@antora/lunr-extension": "^1.0.0-alpha.10",
     "@antora/site-generator": "^3.1.10"
   }
 }