The first result to be the documentation for net/http and the title of the result to be the title of the page, http · net/http · pkg.go.dev
What did you see instead?
The first result was the correct URL, but the title is incorrect: Documents - The Go Programming Language
This problem seems to affect subpackages, and different searches have different results. E.g., searching for ioutil, https://www.google.com/search?q=ioutil+golang
has a title of io.ioutil.ReadAll - The Go Programming Language (picks a specific function).