build(deps): bump github.com/open-policy-agent/opa from 1.6.0 to 1.8.0

Bumps [github.com/open-policy-agent/opa](https://github.com/open-policy-agent/opa) from 1.6.0 to 1.8.0.
- [Release notes](https://github.com/open-policy-agent/opa/releases)
- [Changelog](https://github.com/open-policy-agent/opa/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-policy-agent/opa/compare/v1.6.0...v1.8.0)

---
updated-dependencies:
- dependency-name: github.com/open-policy-agent/opa
  dependency-version: 1.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -1,6 +1,6 @@
 module github.com/opencloud-eu/opencloud
 
-go 1.24.1
+go 1.24.6
 
 require (
 	dario.cat/mergo v1.0.2
@@ -63,7 +63,7 @@ require (
 	github.com/onsi/ginkgo v1.16.5
 	github.com/onsi/ginkgo/v2 v2.25.3
 	github.com/onsi/gomega v1.38.2
-	github.com/open-policy-agent/opa v1.6.0
+	github.com/open-policy-agent/opa v1.8.0
 	github.com/opencloud-eu/libre-graph-api-go v1.0.8-0.20250724122329-41ba6b191e76
 	github.com/opencloud-eu/reva/v2 v2.38.1-0.20250922152322-476bb1f0070a
 	github.com/opensearch-project/opensearch-go/v4 v4.5.0
@@ -179,6 +179,7 @@ require (
 	github.com/cyphar/filepath-securejoin v0.3.6 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/deckarep/golang-set v1.8.0 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.4.0 // indirect
 	github.com/desertbit/timer v0.0.0-20180107155436-c41aec40b27f // indirect
 	github.com/dgraph-io/ristretto v0.2.0 // indirect
 	github.com/dgryski/go-farm v0.0.0-20240924180020-3414d57e47da // indirect
@@ -257,6 +258,12 @@ require (
 	github.com/klauspost/compress v1.18.0 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.11 // indirect
 	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/lestrrat-go/blackmagic v1.0.4 // indirect
+	github.com/lestrrat-go/httpcc v1.0.1 // indirect
+	github.com/lestrrat-go/httprc/v3 v3.0.0 // indirect
+	github.com/lestrrat-go/jwx/v3 v3.0.10 // indirect
+	github.com/lestrrat-go/option v1.0.1 // indirect
+	github.com/lestrrat-go/option/v2 v2.0.0 // indirect
 	github.com/libregraph/oidc-go v1.1.0 // indirect
 	github.com/longsleep/go-metrics v1.0.0 // indirect
 	github.com/longsleep/rndm v1.2.0 // indirect
@@ -318,10 +325,11 @@ require (
 	github.com/rs/xid v1.6.0 // indirect
 	github.com/russellhaering/goxmldsig v1.5.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/segmentio/asm v1.2.0 // indirect
 	github.com/segmentio/kafka-go v0.4.49 // indirect
 	github.com/segmentio/ksuid v1.0.4 // indirect
 	github.com/sercand/kuberesolver/v5 v5.1.1 // indirect
-	github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect
+	github.com/sergi/go-diff v1.4.0 // indirect
 	github.com/sethvargo/go-diceware v0.5.0 // indirect
 	github.com/sethvargo/go-password v0.3.1 // indirect
 	github.com/shamaton/msgpack/v2 v2.3.1 // indirect
@@ -333,7 +341,7 @@ require (
 	github.com/spf13/pflag v1.0.9 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/studio-b12/gowebdav v0.9.0 // indirect
-	github.com/tchap/go-patricia/v2 v2.3.2 // indirect
+	github.com/tchap/go-patricia/v2 v2.3.3 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.1 // indirect
 	github.com/tinylib/msgp v1.3.0 // indirect
@@ -341,7 +349,8 @@ require (
 	github.com/tklauser/numcpus v0.8.0 // indirect
 	github.com/toorop/go-dkim v0.0.0-20201103131630-e1cd1a0a5208 // indirect
 	github.com/trustelem/zxcvbn v1.0.1 // indirect
-	github.com/vektah/gqlparser/v2 v2.5.28 // indirect
+	github.com/valyala/fastjson v1.6.4 // indirect
+	github.com/vektah/gqlparser/v2 v2.5.30 // indirect
 	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
 	github.com/wk8/go-ordered-map v1.0.0 // indirect
 	github.com/xanzy/ssh-agent v0.3.3 // indirect
@@ -374,7 +383,7 @@ require (
 	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	sigs.k8s.io/yaml v1.4.0 // indirect
+	sigs.k8s.io/yaml v1.6.0 // indirect
 )
 
 replace github.com/studio-b12/gowebdav => github.com/kobergj/gowebdav v0.0.0-20250102091030-aa65266db202