chore: Bump github.com/pb33f/libopenapi from 0.27.2 to 0.28.1

Bumps [github.com/pb33f/libopenapi](https://github.com/pb33f/libopenapi) from 0.27.2 to 0.28.1.
- [Release notes](https://github.com/pb33f/libopenapi/releases)
- [Commits](pb33f/libopenapi@v0.27.2...v0.28.1)

---
updated-dependencies:
- dependency-name: github.com/pb33f/libopenapi
  dependency-version: 0.28.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

go.mod

@@ -23,7 +23,7 @@ require (
 	github.com/jarcoal/httpmock v1.4.1
 	github.com/mongodb-forks/digest v1.1.0
 	github.com/mongodb/atlas-sdk-go v1.0.1-0.20251103084024-4a19449c6541
-	github.com/pb33f/libopenapi v0.27.2
+	github.com/pb33f/libopenapi v0.28.1
 	github.com/sebdah/goldie/v2 v2.8.0
 	github.com/spf13/cast v1.10.0
 	github.com/stretchr/testify v1.11.1

go.sum

@@ -475,8 +475,8 @@ github.com/openlyinc/pointy v1.1.2 h1:LywVV2BWC5Sp5v7FoP4bUD+2Yn5k0VNeRbU5vq9jUM
 github.com/openlyinc/pointy v1.1.2/go.mod h1:w2Sytx+0FVuMKn37xpXIAyBNhFNBIJGR/v2m7ik1WtM=
 github.com/pb33f/jsonpath v0.1.2 h1:PlqXjEyecMqoYJupLxYeClCGWEpAFnh4pmzgspbXDPI=
 github.com/pb33f/jsonpath v0.1.2/go.mod h1:TtKnUnfqZm48q7a56DxB3WtL3ipkVtukMKGKxaR/uXU=
-github.com/pb33f/libopenapi v0.27.2 h1:buDwqA6SKWwrG4YZwJprBV+bk8uizqLgiF4lkIV9w14=
-github.com/pb33f/libopenapi v0.27.2/go.mod h1:mHMHA3ZKSZDTInNAuUtqkHlKLIjPm2HN1vgsGR57afc=
+github.com/pb33f/libopenapi v0.28.1 h1:vqE1Q08F6ohABsyKcK8kX7HYkR/+sILXGwCgFzF+aOg=
+github.com/pb33f/libopenapi v0.28.1/go.mod h1:mHMHA3ZKSZDTInNAuUtqkHlKLIjPm2HN1vgsGR57afc=
 github.com/pb33f/ordered-map/v2 v2.3.0 h1:k2OhVEQkhTCQMhAicQ3Z6iInzoZNQ7L9MVomwKBZ5WQ=
 github.com/pb33f/ordered-map/v2 v2.3.0/go.mod h1:oe5ue+6ZNhy7QN9cPZvPA23Hx0vMHnNVeMg4fGdCANw=
 github.com/pierrec/lz4 v2.0.5+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=