Don't publish EOL ruby images

Author: rafaelfranca

.github/workflows/publish-new-image-version.yaml

@@ -35,14 +35,6 @@ jobs:
           - 3.2.2
           - 3.2.1
           - 3.2.0
-          - 3.1.7
-          - 3.1.6
-          - 3.1.5
-          - 3.1.4
-          - 3.1.3
-          - 3.1.2
-          - 3.1.1
-          - 3.1.0
 
     runs-on: ubuntu-latest
     permissions:

CONTRIBUTING.md

@@ -38,7 +38,7 @@ the same process as for features.
 
 The image is published using the [devcontainers/ci](https://github.com/devcontainers/ci) Github Action. This workflow
 is kicked off by the creation of a new tag on Github. Tags should be in the form `ruby-*.*.*`, where the * represent
-the **image version** (not the ruby version). Images will be published for all `3.*.*` ruby versions.
+the **image version** (not the ruby version). Images will be published for all [maintained Ruby versions](https://www.ruby-lang.org/en/downloads/).
 
 ## Publishing new Ruby versions