Update docs

docs/Aggregation/Filter.md

docs/Aggregation/Filters.md

docs/HowTo/HowToSearch.md

docs/Query/ConstantScore.md

docs/Query/Filtered.md

docs/Query/FunctionScore.md

docs/Query/index.md

docs/index.md

src/DslTypeAwareTrait.php

src/Query/FunctionScoreQuery.php

src/SearchEndpoint/QueryEndpoint.php

tests/DslTypeAwareTraitTest.php

tests/SearchTest.php