Bump mongo from 2.19.0 to 2.20.0 (#1532)

Bumps [mongo](https://github.com/mongodb/mongo-ruby-driver) from 2.19.0 to 2.20.0.
- [Release notes](https://github.com/mongodb/mongo-ruby-driver/releases)
- [Changelog](https://github.com/mongodb/mongo-ruby-driver/blob/master/docs/release-notes.txt)
- [Commits](mongodb/mongo-ruby-driver@v2.19.0...v2.20.0)

---
updated-dependencies:
- dependency-name: mongo
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -146,7 +146,7 @@ GEM
     blurhash (0.1.7)
     bootsnap (1.18.3)
       msgpack (~> 1.2)
-    bson (4.15.0)
+    bson (5.0.0)
     builder (3.2.4)
     byebug (11.1.3)
     chewy (0.9.0)
@@ -431,8 +431,8 @@ GEM
     mini_mime (1.1.5)
     mini_portile2 (2.8.6)
     minitest (5.22.3)
-    mongo (2.19.0)
-      bson (>= 4.14.1, < 5.0.0)
+    mongo (2.20.0)
+      bson (>= 4.14.1, < 6.0.0)
     msgpack (1.7.2)
     multi_json (1.15.0)
     multi_xml (0.6.0)