readme: fix typo in installation step overview
Closes: [via git-merge-pr]
@@ -31,7 +31,7 @@ checks or backwards incompatible changes that break your build. By
using the master branch you agree to become a beta tester.
To use the master branch, a simple `go get -u
-honnef.co/go/tools/cmd....` suffices. You can also install a subset of
+honnef.co/go/tools/cmd/...` suffices. You can also install a subset of
the commands, for example only staticcheck with `go get -u
honnef.co/go/tools/cmd/staticcheck`.
