Bump flipper-active_record from 0.20.3 to 0.20.4 (#13016)

Bumps [flipper-active_record](https://github.com/jnunemaker/flipper) from 0.20.3 to 0.20.4.
- [Release notes](https://github.com/jnunemaker/flipper/releases)
- [Changelog](https://github.com/jnunemaker/flipper/blob/master/Changelog.md)
- [Commits](https://github.com/jnunemaker/flipper/compare/v0.20.3...v0.20.4)

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

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

Gemfile

@@ -36,7 +36,7 @@ gem "fastly", "~> 3.0" # Client library for the Fastly acceleration system
 gem "feedjira", "~> 3.1" # A feed fetching and parsing library
 gem "field_test", "~> 0.4" # A/B testing
 gem "flipper", "~> 0.20.4" # Feature flipping / flags for Ruby
-gem "flipper-active_record", "~> 0.20.3" # Store Flipper flags in ActiveRecord
+gem "flipper-active_record", "~> 0.20.4" # Store Flipper flags in ActiveRecord
 gem "flipper-ui", "~> 0.20.4"
 gem "fog-aws", "~> 3.9" # 'fog' gem to support Amazon Web Services
 gem "front_matter_parser", "~> 1.0" # Parse a front matter from syntactically correct strings or files

Gemfile.lock

@@ -310,9 +310,9 @@ GEM
       distribution
       railties (>= 5)
     flipper (0.20.4)
-    flipper-active_record (0.20.3)
+    flipper-active_record (0.20.4)
       activerecord (>= 5.0, < 7)
-      flipper (~> 0.20.3)
+      flipper (~> 0.20.4)
     flipper-ui (0.20.4)
       erubi (>= 1.0.0, < 2.0.0)
       flipper (~> 0.20.4)
@@ -931,7 +931,7 @@ DEPENDENCIES
   feedjira (~> 3.1)
   field_test (~> 0.4)
   flipper (~> 0.20.4)
-  flipper-active_record (~> 0.20.3)
+  flipper-active_record (~> 0.20.4)
   flipper-ui (~> 0.20.4)
   fog-aws (~> 3.9)
   front_matter_parser (~> 1.0)