Bump github.com/aws/aws-sdk-go from 1.54.19 to 1.55.5 in /sigv4 (#671)

Bumps [github.com/aws/aws-sdk-go](https:/aws/aws-sdk-go) from 1.54.19 to 1.55.5.
- [Release notes](https:/aws/aws-sdk-go/releases)
- [Commits](aws/aws-sdk-go@v1.54.19...v1.55.5)

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

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

sigv4/go.mod

@@ -5,7 +5,7 @@ go 1.20
 replace github.com/prometheus/common => ../
 
 require (
- github.com/aws/aws-sdk-go v1.54.19
+ github.com/aws/aws-sdk-go v1.55.5
  github.com/prometheus/common v0.53.0
  github.com/stretchr/testify v1.9.0
  gopkg.in/yaml.v2 v2.4.0

sigv4/go.sum

@@ -1,5 +1,5 @@
-github.com/aws/aws-sdk-go v1.54.19 h1:tyWV+07jagrNiCcGRzRhdtVjQs7Vy41NwsuOcl0IbVI=
-github.com/aws/aws-sdk-go v1.54.19/go.mod h1:eRwEWoyTWFMVYVQzKMNHWP5/RV4xIUGMQfXQHfHkpNU=
+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/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 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=