Bump docker/build-push-action from 5 to 6 in /.github/workflows (#262)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5...v6)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

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

@@ -53,7 +53,7 @@ jobs:
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Build/push - prereqs only
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: true
           # build from docker/ directory
@@ -64,7 +64,7 @@ jobs:
             jessebot/onboardme:prereqs
 
       - name: Build/push - run onboardme - default pkgs
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: true
           # build from docker/ directory
@@ -76,7 +76,7 @@ jobs:
             jessebot/onboardme:debian12
 
       - name: Build/push - default + devops pkgs
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: true
           # build from docker/ directory
@@ -90,7 +90,7 @@ jobs:
             jessebot/onboardme:debian12-devops
 
       - name: Build/push - full tui pkgs
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: true
           # build from docker/ directory
@@ -125,7 +125,7 @@ jobs:
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Build/push - arm - prereqs only
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: true
           # build from docker/ directory
@@ -138,7 +138,7 @@ jobs:
             jessebot/onboardme:arm-prereqs
 
       - name: Build/push - arm - default pkgs
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: true
           # build from docker/ directory
@@ -152,7 +152,7 @@ jobs:
             jessebot/onboardme:debian12-arm
 
       - name: Build/push arm - default + devops pkgs
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: true
           # build from docker/ directory
@@ -168,7 +168,7 @@ jobs:
             jessebot/onboardme:debian12-arm-devops
 
       - name: Build/push arm - full tui pkgs
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: true
           # build from docker/ directory