No duplicate steps for workflow

.github/workflows/tagging.yml

@@ -6,7 +6,25 @@ on:
       - '*'
 
 jobs:
+  prepare:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      checks: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: "Install and build"
+        uses: ./.github/actions/install-build
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-outputs
+          path: .pio
+        
   build:
+    needs: prepare
     strategy:
       matrix:
         epd_variant: [213epd, 29epd]
@@ -21,20 +39,17 @@ jobs:
       contents: write
       checks: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/download-artifact@v4
         with:
-          submodules: recursive
-      - name: "Install and build"
-        uses: ./.github/actions/install-build
-
+          name: build-outputs
+          path: .pio
       - name: Install esptools.py
         run: pip install --upgrade esptool
-
       - name: Create merged firmware binary
         run: mkdir -p ${{ matrix.chip.name }}_${{ matrix.epd_variant }} && esptool.py --chip ${{ matrix.chip.version }} merge_bin -o ${{ matrix.chip.name }}_${{ matrix.epd_variant }}/${{ matrix.chip.name }}_${{ matrix.epd_variant }}.bin --flash_mode dio 0x0000 .pio/build/${{ matrix.chip.name }}_${{ matrix.epd_variant }}/bootloader.bin 0x8000 .pio/build/${{ matrix.chip.name }}_${{ matrix.epd_variant }}/partitions.bin 0xe000 ~/.platformio/packages/framework-arduinoespressif32/tools/partitions/boot_app0.bin 0x10000 .pio/build/${{ matrix.chip.name }}_${{ matrix.epd_variant }}/firmware.bin 0x369000 .pio/build/${{ matrix.chip.name }}_${{ matrix.epd_variant }}/littlefs.bin
 
       - name: Create checksum for merged binary
-        run: shasum -a 256 ${{ matrix.chip.name }}_${{ matrix.epd_variant }}/${{ matrix.chip.name }}_${{ matrix.epd_variant }}.bin | awk '{print $1}' > $${{ matrix.chip.name }}_${{ matrix.epd_variant }}/${{ matrix.chip.name }}_${{ matrix.epd_variant }}.sha256
+        run: shasum -a 256 ${{ matrix.chip.name }}_${{ matrix.epd_variant }}/${{ matrix.chip.name }}_${{ matrix.epd_variant }}.bin | awk '{print $1}' > ${{ matrix.chip.name }}_${{ matrix.epd_variant }}/${{ matrix.chip.name }}_${{ matrix.epd_variant }}.sha256
 
       # - name: Write commit hash to file
       #   run: echo $GITHUB_SHA > ${{ matrix.chip.name }}_${{ matrix.epd_variant }}/commit.txt
@@ -46,7 +61,7 @@ jobs:
       #   run: cp .pio/build/${{ matrix.chip.name }}_${{ matrix.epd_variant }}/*.bin ~/.platformio/packages/framework-arduinoespressif32/tools/partitions/boot_app0.bin ${{ matrix.chip.name }}_${{ matrix.epd_variant }}
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: build-${{ matrix.chip.name }}-${{ matrix.epd_variant }}
           path: |