gopls/README.md: fix wording around supported Go versions

Change-Id: I25eb83edc5fca0958833371d2d4a6c28af6c21c7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/444175
TryBot-Result: Gopher Robot <gobot@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>

Author: findleyr

gopls/README.md

@@ -76,9 +76,9 @@ meaning that it officially supports the last 2 major Go releases. Per
 support for the last 4 major Go releases, but this support extends only to not
 breaking the build and avoiding easily fixable regressions.
 
-The following table shows the final gopls version that supports being built at
-a given Go Version. Any more recent Go versions missing from this table can
-still be built with the latest version of gopls.
+The following table shows the final gopls version that supports being built
+with a given Go version. Go releases more recent than any in the table can
+build any version of gopls.
 
 | Go Version  | Final gopls Version With Support |
 | ----------- | -------------------------------- |