Bump aws-sdk-ec2 from 1.277.0 to 1.281.0

Bumps [aws-sdk-ec2](https://github.com/aws/aws-sdk-ruby) from 1.277.0 to 1.281.0.
- [Release notes](https://github.com/aws/aws-sdk-ruby/releases)
- [Changelog](https://github.com/aws/aws-sdk-ruby/blob/version-3/gems/aws-sdk-ec2/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-ruby/commits)

---
updated-dependencies:
- dependency-name: aws-sdk-ec2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -29,13 +29,13 @@ GEM
     ansi (1.5.0)
     ast (2.4.2)
     aws-eventstream (1.2.0)
-    aws-partitions (1.525.0)
-    aws-sdk-core (3.122.0)
+    aws-partitions (1.530.0)
+    aws-sdk-core (3.122.1)
       aws-eventstream (~> 1, >= 1.0.2)
       aws-partitions (~> 1, >= 1.525.0)
       aws-sigv4 (~> 1.1)
       jmespath (~> 1.0)
-    aws-sdk-ec2 (1.277.0)
+    aws-sdk-ec2 (1.281.0)
       aws-sdk-core (~> 3, >= 3.122.0)
       aws-sigv4 (~> 1.1)
     aws-sdk-rds (1.130.0)