Upgrade GitHub Actions (#11)

* Upgrade actions to fix deprecation warnings
* Remove trailing whitespace

Author: wborn

.github/workflows/proxy.yml

@@ -20,17 +20,17 @@ on:
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
   image_proxy:
-  
+
     env:
       PLATFORM: linux/amd64,linux/aarch64,linux/arm/v7,linux/arm/v6
-      
+
     runs-on: ubuntu-latest
-    
+
     steps:
-      - uses: styfle/cancel-workflow-action@3d86a7cc43670094ac248017207be0295edbc31d # 0.8.0
+      - uses: styfle/cancel-workflow-action@85880fa0301c86cca9da44039ee3bb12d3bedbfa # 0.12.1
         with:
           access_token: ${{ github.token }}
-      
+
       - name: Set tags
         run: |
           if [ -z "$TAG" ]; then
@@ -40,30 +40,30 @@ jobs:
           fi
         env:
           TAG: ${{ github.event.release.tag_name }}
-          
-      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2
-      
+
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+
       - name: set up QEMU
-        uses: docker/setup-qemu-action@27d0a4f181a40b142cce983c5393082c365d1480 # v1
+        uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392 # v3
         with:
           platforms: all
-      
+
       - name: install buildx
         id: buildx
-        uses: docker/setup-buildx-action@f211e3e9ded2d9377c8cadc4489a4e38014bc4c9 # v1
+        uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2 # v3
         with:
           version: latest
           install: true
-      
+
       - name: available platforms
         run: echo ${{ steps.buildx.outputs.platforms }}
-        
+
       - name: Login to DockerHub
-        uses: docker/login-action@dd4fa0671be5250ee6f50aedf4cb05514abda2c7 # v1
+        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3
         with:
           username: ${{ secrets._TEMP_DOCKERHUB_USER }}
           password: ${{ secrets._TEMP_DOCKERHUB_PASSWORD }}
-        
+
       - name: build and push images
         run: |
           docker build --build-arg GIT_COMMIT=${{ github.sha }} --push --platform $PLATFORM $TAG .