Bump fog-aws from 3.14.0 to 3.15.0

Bumps [fog-aws](https://github.com/fog/fog-aws) from 3.14.0 to 3.15.0.
- [Release notes](https://github.com/fog/fog-aws/releases)
- [Changelog](https://github.com/fog/fog-aws/blob/master/CHANGELOG.md)
- [Commits](https://github.com/fog/fog-aws/compare/v3.14.0...v3.15.0)

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

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

Gemfile.lock

@@ -164,7 +164,7 @@ GEM
       dry-logic (~> 1.0, >= 1.0.2)
     equalizer (0.0.11)
     erubi (1.11.0)
-    excon (0.92.3)
+    excon (0.93.1)
     factory_bot (6.2.0)
       activesupport (>= 5.0.0)
     factory_bot_rails (6.2.0)
@@ -179,7 +179,7 @@ GEM
     ffi-compiler (1.0.1)
       ffi (>= 1.0.0)
       rake
-    fog-aws (3.14.0)
+    fog-aws (3.15.0)
       fog-core (~> 2.1)
       fog-json (~> 1.1)
       fog-xml (~> 0.1)