Bump mongoid from 8.1.6 to 8.1.7

Bumps [mongoid](https://github.com/mongodb/mongoid) from 8.1.6 to 8.1.7.
- [Release notes](https://github.com/mongodb/mongoid/releases)
- [Changelog](https://github.com/mongodb/mongoid/blob/master/CHANGELOG.md)
- [Commits](mongodb/mongoid@v8.1.6...v8.1.7)

---
updated-dependencies:
- dependency-name: mongoid
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -249,8 +249,8 @@ GEM
     minitest (5.25.1)
     mongo (2.21.0)
       bson (>= 4.14.1, < 6.0.0)
-    mongoid (8.1.6)
-      activemodel (>= 5.1, < 7.3, != 7.0.0)
+    mongoid (8.1.7)
+      activemodel (>= 5.1, < 8.1, != 7.0.0)
       concurrent-ruby (>= 1.0.5, < 2.0)
       mongo (>= 2.18.0, < 3.0.0)
       ruby2_keywords (~> 0.0.5)
@@ -671,7 +671,7 @@ GEM
       ffi (~> 1.12)
       logger
     ruby2_keywords (0.0.5)
-    securerandom (0.3.1)
+    securerandom (0.3.2)
     sentry-rails (5.21.0)
       railties (>= 5.0)
       sentry-ruby (~> 5.21.0)