chore(dev): bump docker/build-push-action to latest (#1172)

Author: brendan-kellam

.github/workflows/_build.yml

@@ -104,7 +104,7 @@ jobs:
 
       - name: Build Docker image
         id: build
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: .
           build-args: |

.github/workflows/pr-gate.yml

@@ -19,6 +19,6 @@ jobs:
 
       - name: Build Docker image
         id: build
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: .