Build(deps): Bump execjs from 2.7.0 to 2.8.0 (#13016)

Bumps [execjs](https://github.com/rails/execjs) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/rails/execjs/releases)
- [Commits](rails/execjs@v2.7.0...v2.8.0)

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

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

Gemfile.lock

@@ -135,7 +135,7 @@ GEM
     ember-source (2.18.2)
     erubi (1.10.0)
     excon (0.81.0)
-    execjs (2.7.0)
+    execjs (2.8.0)
     exifr (1.3.9)
     fabrication (2.22.0)
     faker (2.17.0)