fix: refactor _tagsFromString to _tags_from_str (#1279)

This is a one liner  - seems we have to refactor a method...

src/viur/core/skeleton.py

@@ -770,7 +770,7 @@ def fulltextSearch(self, queryString: str, databaseQuery: db.Query) -> list[db.E
         """
         Run a fulltext search
         """
-        keywords = list(self._tagsFromString(queryString))[:10]
+        keywords = list(self._tags_from_str(queryString))[:10]
         resultScoreMap = {}
         resultEntryMap = {}