Update lunr[languages] requirement from <0.7,>=0.6 to >=0.6,<0.8

Updates the requirements on [lunr[languages]](https://github.com/yeraydiazdiaz/lunr.py) to permit the latest version.
- [Changelog](https://github.com/yeraydiazdiaz/lunr.py/blob/master/CHANGELOG.md)
- [Commits](yeraydiazdiaz/lunr.py@0.6.0...0.7.0.post1)

---
updated-dependencies:
- dependency-name: lunr[languages]
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements/base.txt

@@ -1,5 +1,5 @@
 imagesize>=1.4,<1.5
-lunr[languages]>=0.6,<0.7
+lunr[languages]>=0.6,<0.8
 markdownify>=0.11,<0.12
 orjson>=3.8,<3.10
 packaging>=20,<24