message: docs: clarify lack of latest tag on release images
  Fixes
diff: @@ -41,13 +41,10 @@ be found in the following repositories:
  * `envoyproxy/envoy-alpine-debug <https://hub.docker.com/r/envoyproxy/envoy-alpine-debug/tags/>`_:
  Release binary with debug symbols on top of a **glibc** alpine base.
  -In the above repositories, the *latest* tag points to the latest official release.
  -
  .. note::
  - The above repositories used to contain the dev images described below. They remain to avoid
  - breaking existing users. New dev images are added to the repositories described in the following
  - section.
  + In the above repositories, we do **not** tag a *latest* image. As we now do security/stable
  + releases, *latest* has no good meaning and users should pin to a specific tag.
  On every master commit we additionally create a set of development Docker images. These images can
  be found in the following repositories:
  