Bump github.com/sigstore/sigstore from 1.8.4 to 1.8.5

Bumps [github.com/sigstore/sigstore](https://github.com/sigstore/sigstore) from 1.8.4 to 1.8.5.
- [Release notes](https://github.com/sigstore/sigstore/releases)
- [Commits](sigstore/sigstore@v1.8.4...v1.8.5)

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

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -1,6 +1,7 @@
 module github.com/tektoncd/pipeline
 
 go 1.22
+toolchain go1.22.4
 
 require (
 	github.com/Microsoft/go-winio v0.6.2 // indirect
@@ -18,14 +19,14 @@ require (
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/opencontainers/image-spec v1.1.0
 	github.com/pkg/errors v0.9.1
-	github.com/sigstore/sigstore v1.8.4
+	github.com/sigstore/sigstore v1.8.5
 	github.com/spiffe/go-spiffe/v2 v2.3.0
 	github.com/spiffe/spire-api-sdk v1.9.6
 	github.com/tektoncd/plumbing v0.0.0-20220817140952-3da8ce01aeeb
 	go.opencensus.io v0.24.0
 	go.uber.org/zap v1.27.0
-	golang.org/x/exp v0.0.0-20230515195305-f3d0a9c9a5cc
-	golang.org/x/oauth2 v0.20.0 // indirect
+	golang.org/x/exp v0.0.0-20240112132812-db7319d0e0e3
+	golang.org/x/oauth2 v0.21.0 // indirect
 	gomodules.xyz/jsonpatch/v2 v2.4.0
 	k8s.io/api v0.29.6
 	k8s.io/apimachinery v0.29.6
@@ -115,7 +116,7 @@ require (
 	github.com/hashicorp/vault/api v1.14.0 // indirect
 	github.com/jellydator/ttlcache/v3 v3.2.0 // indirect
 	github.com/kylelemons/godebug v1.1.0 // indirect
-	github.com/letsencrypt/boulder v0.0.0-20230907030200-6d76a0f91e1e // indirect
+	github.com/letsencrypt/boulder v0.0.0-20240613153800-a69ba997609e // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/mxk/go-flowrate v0.0.0-20140419014527-cca7078d478f // indirect
@@ -127,14 +128,13 @@ require (
 	github.com/stoewer/go-strcase v1.2.0 // indirect
 	github.com/titanous/rocacheck v0.0.0-20171023193734-afe73141d399 // indirect
 	github.com/zeebo/errs v1.3.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.49.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.49.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.52.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.52.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.27.0 // indirect
 	go.opentelemetry.io/otel/metric v1.27.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.2.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20240520151616-dc85e6b867a5 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240515191416-fc5f0ca64291 // indirect
-	gopkg.in/go-jose/go-jose.v2 v2.6.3 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240520151616-dc85e6b867a5 // indirect
 )
 
 // TODO: Remove this once github.com/google/go-containerregistry uses github.com/aws/aws-sdk-go-v2 >v1.23.0
@@ -227,15 +227,15 @@ require (
 	github.com/vbatts/tar-split v0.11.3 // indirect
 	go.uber.org/automaxprocs v1.5.3 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/crypto v0.23.0 // indirect
+	golang.org/x/crypto v0.24.0 // indirect
 	golang.org/x/mod v0.17.0 // indirect
 	golang.org/x/net v0.25.0 // indirect
 	golang.org/x/sync v0.7.0
-	golang.org/x/sys v0.20.0 // indirect
-	golang.org/x/term v0.20.0 // indirect
-	golang.org/x/text v0.15.0 // indirect
+	golang.org/x/sys v0.21.0 // indirect
+	golang.org/x/term v0.21.0 // indirect
+	golang.org/x/text v0.16.0 // indirect
 	golang.org/x/time v0.5.0 // indirect
-	golang.org/x/tools v0.20.0 // indirect
+	golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d // indirect
 	google.golang.org/api v0.181.0 // indirect
 	google.golang.org/genproto v0.0.0-20240401170217-c3f982113cda // indirect
 	google.golang.org/grpc v1.64.0