build(deps): bump github.com/go-git/go-git/v5 in /tests/integration

Bumps [github.com/go-git/go-git/v5](https://github.com/go-git/go-git) from 5.16.5 to 5.17.1.
- [Release notes](https://github.com/go-git/go-git/releases)
- [Commits](https://github.com/go-git/go-git/compare/v5.16.5...v5.17.1)

---
updated-dependencies:
- dependency-name: github.com/go-git/go-git/v5
  dependency-version: 5.17.1
  dependency-type: direct:production
...

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

tests/integration/go.mod

@@ -17,7 +17,7 @@ require (
 	github.com/fluxcd/pkg/runtime v0.103.0
 	github.com/fluxcd/source-controller/api v1.7.4
 	github.com/fluxcd/test-infra/tftestenv v0.0.0-20250626232827-e0ca9c3f8d7b
-	github.com/go-git/go-git/v5 v5.16.5
+	github.com/go-git/go-git/v5 v5.17.1
 	github.com/google/go-containerregistry v0.20.7
 	github.com/hashicorp/terraform-exec v0.24.0
 	github.com/hashicorp/terraform-json v0.27.2
@@ -71,7 +71,7 @@ require (
 	github.com/fluxcd/pkg/version v0.14.0 // indirect
 	github.com/fxamacker/cbor/v2 v2.9.0 // indirect
 	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
-	github.com/go-git/go-billy/v5 v5.7.0 // indirect
+	github.com/go-git/go-billy/v5 v5.8.0 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-openapi/jsonpointer v0.21.1 // indirect