Consider current version of the documentation when weighting search results

This is somewhat related to https://github.com/spring-projects/spring-security/issues/11056.

When there are multiple hits for the same section in different versions of the documentation, I wonder if they could be weighted based on the version of the documentation that I am searching from. For example, https://docs.spring.io/spring-security/reference/ is currently serving the documentation for Spring Security 5.7.1 so results in the 5.7.1 docs are likely to be what I am looking for. If I search for "Testing", I'm shown 10 results. Based on experience with other search engines, I'd assume that the first result is considered to be the best but it's for the 5.7.0 docs: https://docs.spring.io/spring-security/reference/5.7.0/servlet/test/index.html#page-title.

No files, tests, or entry points are named. Start by tracing the documentation search from the 5.7.1 reference site and compare the ranking for “Testing” across the 5.7.1 and 5.7.0 documentation; done means results from the current documentation version receive appropriate weighting.