Bump docker/build-push-action from 6 to 7

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6 to 7.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6...v7)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -29,7 +29,7 @@ jobs:
 
       - name: Build and push Postgres 15
         id: docker_build_15
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           build-args: |
             PG_VERSION=15.10
@@ -44,7 +44,7 @@ jobs:
 
       - name: Build and push Postgres 15 Timescale DB
         id: docker_build_15_timescaledb
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           build-args: |
             PG_VERSION=15.10
@@ -59,7 +59,7 @@ jobs:
 
       - name: Build and push Postgres 16
         id: docker_build_16
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           build-args: |
             PG_VERSION=16.6
@@ -74,7 +74,7 @@ jobs:
 
       - name: Build and push Postgres 16 Timescale DB
         id: docker_build_16_timescaledb
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           build-args: |
             PG_VERSION=16.6
@@ -89,7 +89,7 @@ jobs:
 
       - name: Build and push Postgres 17
         id: docker_build_17
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           build-args: |
             PG_VERSION=17.2
@@ -104,7 +104,7 @@ jobs:
 
       - name: Build and push Postgres 17 Timescale DB
         id: docker_build_17_timescaledb
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           build-args: |
             PG_VERSION=17.2