Update esphome/workflows action to v2025.8.1

Author: renovate[bot]

.github/workflows/publish-firmware.yml

@@ -83,7 +83,7 @@ jobs:
       - set-release-version
       - check-esphome-names
       - read-firmware-files
-    uses: esphome/workflows/.github/workflows/build.yml@2025.4.0
+    uses: esphome/workflows/.github/workflows/build.yml@2025.8.1
     with:
       files: ${{ needs.read-firmware-files.outputs.files }}
       esphome-version: 2025.7.2
@@ -96,6 +96,6 @@ jobs:
       - build-firmware
       - set-release-version
       - read-firmware-files
-    uses: esphome/workflows/.github/workflows/upload-to-gh-release.yml@2025.4.0
+    uses: esphome/workflows/.github/workflows/upload-to-gh-release.yml@2025.8.1
     with:
       version: ${{ needs.set-release-version.outputs.release_version }}