Docs: amend the declaration about missing e2e tests
We now have a good amount of e2e coverage, so changing the declaration
accordingly.
@@ -17,12 +17,10 @@ usual. Please file bugs! We want to hear from you and address pain points.
## Test coverage
-The codebase has reasonable test coverage, but lacks comprehensive
-end-to-end tests. Empirical testing, combined with the unit tests we
-have, show that the common codepaths work properly, but edge cases may
-have bugs.
-
-Increasing test coverage is an active area of work.
+The codebase has reasonable test coverage, and a good amount of
+end-to-end tests which covers against most part of regressions.
+Despite that, edge cases may have bugs, so if you find unexpected
+behaviours, please consider [filing an issue](https://github.com/metallb/metallb/issues).
## Configuration format
