Bump activerecord from 8.0.2 to 8.0.2.1 in /benchmarks/activerecord (#391)

Bumps [activerecord](https://github.com/rails/rails) from 8.0.2 to 8.0.2.1.
- [Release notes](https://github.com/rails/rails/releases)
- [Changelog](https://github.com/rails/rails/blob/v8.0.2.1/activerecord/CHANGELOG.md)
- [Commits](rails/rails@v8.0.2...v8.0.2.1)

---
updated-dependencies:
- dependency-name: activerecord
  dependency-version: 8.0.2.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

benchmarks/activerecord/Gemfile.lock

@@ -1,13 +1,13 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (8.0.2)
-      activesupport (= 8.0.2)
-    activerecord (8.0.2)
-      activemodel (= 8.0.2)
-      activesupport (= 8.0.2)
+    activemodel (8.0.2.1)
+      activesupport (= 8.0.2.1)
+    activerecord (8.0.2.1)
+      activemodel (= 8.0.2.1)
+      activesupport (= 8.0.2.1)
       timeout (>= 0.4.0)
-    activesupport (8.0.2)
+    activesupport (8.0.2.1)
       base64
       benchmark (>= 0.3)
       bigdecimal