WIP gha split jobs to workaround buildx bug ?

ERROR: failed to solve: python:3.9-slim-bookworm: failed to authorize: failed to fetch oauth token: Post "https://auth.docker.io/token": EOF
Error: buildx failed with: ERROR: failed to solve: python:3.9-slim-bookworm: failed to authorize: failed to fetch oauth token: Post "https://auth.docker.io/token": EOF

This happen always but only for the second docker build.

Author: c2main

.github/workflows/docs.yml

@@ -5,40 +5,28 @@ env:
   tikz_image:   hapostgres/latexmk-pdftocairo:latest
 
 on:
-  push:
+  pull_request:
     branches:
     - main
-  pull_request:
+  push:
     branches:
     - main
 
   workflow_dispatch:
 
 jobs:
   docs:
-    name: Building docs
+    name: Build sphinx html
     runs-on: ubuntu-latest
     strategy:
-      fail-fast: false
+      fail-fast: true
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Build hapostgres/latexmk-pdftocairo docker image
-        uses: docker/build-push-action@v5
-        with:
-          context: ./docs/tikz
-          load: true
-          tags: ${{ env.tikz_image }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=min
-
-      - name: Build pdf/png/svg files
-        run: docker run --rm -v ./docs/tikz:/tikz ${{ env.tikz_image }} make all
-
       - name: Build hapostgres/sphinx-citus docker image
         uses: docker/build-push-action@v5
         with:
@@ -50,3 +38,27 @@ jobs:
 
       - name: Build docs with sphinx
         run: docker run --rm -v ./docs:/docs ${{ env.sphinx_image }} make html
+
+  pictures:
+    name: Building latexmk/pdftocario pictures
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build hapostgres/latexmk-pdftocairo docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./docs/tikz
+          load: true
+          tags: ${{ env.tikz_image }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=min
+
+      - name: Build pdf/png/svg files
+        run: docker run --rm -v ./docs/tikz:/tikz ${{ env.tikz_image }} make all