Bump rspec-mocks from 3.13.7 to 3.13.8 (#785)

Bumps [rspec-mocks](https://github.com/rspec/rspec) from 3.13.7 to 3.13.8.
- [Changelog](https://github.com/rspec/rspec/blob/rspec-mocks-v3.13.8/rspec-mocks/Changelog.md)
- [Commits](rspec/rspec@rspec-mocks-v3.13.7...rspec-mocks-v3.13.8)

---
updated-dependencies:
- dependency-name: rspec-mocks
  dependency-version: 3.13.8
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -117,7 +117,7 @@ GEM
     rspec-expectations (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
-    rspec-mocks (3.13.7)
+    rspec-mocks (3.13.8)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
     rspec-support (3.13.7)