Bump google-horologist from 0.6.23 to 0.7.15

Bumps `google-horologist` from 0.6.23 to 0.7.15.

Updates `com.google.android.horologist:horologist-compose-layout` from 0.6.23 to 0.7.15
- [Release notes](https://github.com/google/horologist/releases)
- [Commits](google/horologist@v0.6.23...v0.7.15)

Updates `com.google.android.horologist:horologist-compose-tools` from 0.6.23 to 0.7.15
- [Release notes](https://github.com/google/horologist/releases)
- [Commits](google/horologist@v0.6.23...v0.7.15)

Updates `com.google.android.horologist:horologist-tiles` from 0.6.23 to 0.7.15
- [Release notes](https://github.com/google/horologist/releases)
- [Commits](google/horologist@v0.6.23...v0.7.15)

---
updated-dependencies:
- dependency-name: com.google.android.horologist:horologist-compose-layout
  dependency-version: 0.7.15
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: com.google.android.horologist:horologist-compose-tools
  dependency-version: 0.7.15
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: com.google.android.horologist:horologist-tiles
  dependency-version: 0.7.15
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -62,7 +62,7 @@ google-dagger = "2.57"
 google-firebase-bom = '34.2.0'
 google-gson = '2.13.1'
 google-guava = '33.3.1-android'
-google-horologist = '0.6.23'
+google-horologist = '0.7.15'
 google-material = '1.12.0'
 google-compose-material3 = '1.3.2'
 google-mlkit-barcode-scanning = '17.3.0'