Bump vcr from 6.3.1 to 6.4.0

Bumps [vcr](https://github.com/vcr/vcr) from 6.3.1 to 6.4.0.
- [Release notes](https://github.com/vcr/vcr/releases)
- [Changelog](https://github.com/vcr/vcr/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vcr/vcr/compare/v6.3.1...v6.4.0)

---
updated-dependencies:
- dependency-name: vcr
  dependency-version: 6.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -746,8 +746,7 @@ GEM
     validate_url (1.0.15)
       activemodel (>= 3.0.0)
       public_suffix
-    vcr (6.3.1)
-      base64
+    vcr (6.4.0)
     virtus (2.0.0)
       axiom-types (~> 0.1)
       coercible (~> 1.0)