Use word registry in workflows where possible

.github/workflows/docker-tag-push.yml

@@ -1,4 +1,4 @@
-name: Download Docker image and its tags from GitHub artifacts, apply them and push the image to Docker Hub
+name: Download Docker image and its tags from GitHub artifacts, apply them and push the image to the Registry
 
 env:
   REGISTRY: docker.io

.github/workflows/hub-overview.yml

@@ -1,59 +0,0 @@
-name: Update Docker Hub overviews
-
-env:
-  OWNER: ${{ github.repository_owner }}
-
-on:
-  push:
-    branches:
-      - main
-    paths:
-      - ".github/workflows/hub-overview.yml"
-
-      - "images/*/README.md"
-  workflow_dispatch:
-
-jobs:
-  update-overview:
-    runs-on: ubuntu-latest
-    name: update-overview (${{matrix.image}})
-    if: github.repository == 'jupyter/docker-stacks'
-
-    steps:
-      - name: Checkout Repo ⚡️
-        uses: actions/checkout@v4
-
-      - name: Push README to Docker Hub 🐳
-        uses: christian-korneck/update-container-description-action@d36005551adeaba9698d8d67a296bd16fa91f8e8 # v1
-        env:
-          DOCKER_USER: ${{ secrets.DOCKERHUB_USERNAME }}
-          DOCKER_PASS: ${{ secrets.DOCKERHUB_TOKEN }}
-        with:
-          destination_container_repo: ${{ env.OWNER }}/${{ matrix.image }}
-          provider: dockerhub
-          short_description: ${{ matrix.description }}
-          readme_file: images/${{ matrix.image }}/README.md
-
-    strategy:
-      matrix:
-        include:
-          - image: docker-stacks-foundation
-            description: "Tiny base image on which Jupyter apps can be built from https://github.com/jupyter/docker-stacks"
-          - image: base-notebook
-            description: "Base image for Jupyter Notebook stacks from https://github.com/jupyter/docker-stacks"
-          - image: minimal-notebook
-            description: "Minimal Jupyter Notebook Python Stack from https://github.com/jupyter/docker-stacks"
-          - image: scipy-notebook
-            description: "Scientific Jupyter Notebook Python Stack from https://github.com/jupyter/docker-stacks"
-          - image: r-notebook
-            description: "R Jupyter Notebook Stack from https://github.com/jupyter/docker-stacks"
-          - image: julia-notebook
-            description: "Julia Jupyter Notebook Stack from https://github.com/jupyter/docker-stacks"
-          - image: tensorflow-notebook
-            description: "Scientific Jupyter Notebook Python Stack w/ TensorFlow from https://github.com/jupyter/docker-stacks"
-          - image: datascience-notebook
-            description: "Data Science Jupyter Notebook Python Stack from https://github.com/jupyter/docker-stacks"
-          - image: pyspark-notebook
-            description: "Python and Spark Jupyter Notebook Stack from https://github.com/jupyter/docker-stacks"
-          - image: all-spark-notebook
-            description: "Python, Scala, R and Spark Jupyter Notebook Stack from https://github.com/jupyter/docker-stacks"