Bump github.com/aws/aws-sdk-go from 1.55.5 to 1.55.6

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.55.5 to 1.55.6.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Changelog](https://github.com/aws/aws-sdk-go/blob/main/CHANGELOG_PENDING.md)
- [Commits](aws/aws-sdk-go@v1.55.5...v1.55.6)

---
updated-dependencies:
- dependency-name: github.com/aws/aws-sdk-go
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

go.mod

@@ -3,7 +3,7 @@ module github.com/prometheus/sigv4
 go 1.21
 
 require (
-	github.com/aws/aws-sdk-go v1.55.5
+	github.com/aws/aws-sdk-go v1.55.6
 	github.com/prometheus/common v0.62.0
 	github.com/stretchr/testify v1.10.0
 	gopkg.in/yaml.v2 v2.4.0

go.sum

@@ -1,5 +1,5 @@
-github.com/aws/aws-sdk-go v1.55.5 h1:KKUZBfBoyqy5d3swXyiC7Q76ic40rYcbqH7qjh59kzU=
-github.com/aws/aws-sdk-go v1.55.5/go.mod h1:eRwEWoyTWFMVYVQzKMNHWP5/RV4xIUGMQfXQHfHkpNU=
+github.com/aws/aws-sdk-go v1.55.6 h1:cSg4pvZ3m8dgYcgqB97MrcdjUmZ1BeMYKUxMMB89IPk=
+github.com/aws/aws-sdk-go v1.55.6/go.mod h1:eRwEWoyTWFMVYVQzKMNHWP5/RV4xIUGMQfXQHfHkpNU=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=