chore(deps): bump com.github.johnrengelman.shadow from 7.1.2 to 8.1.1

Bumps com.github.johnrengelman.shadow from 7.1.2 to 8.1.1.

---
updated-dependencies:
- dependency-name: com.github.johnrengelman.shadow
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -30,7 +30,7 @@ checker_compat_qual = "2.5.5"
 npm_esbuild = "0.16.1"
 npm_prepack = "0.2.54"
 commons_compress = "1.22"
-shadow_plugin = "7.1.2"
+shadow_plugin = "8.1.1"
 soy = "2022-10-26"
 closure = "v20230103"
 closure_stylesheets = "1.5.0"