build(deps): bump github.com/sigstore/cosign from 1.13.1 to 1.13.2 in /tools (#4251)

Author: dependabot[bot]

tools/go.mod

@@ -174,7 +174,7 @@ require (
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/sasha-s/go-csync v0.0.0-20210812194225-61421b77c44b // indirect
 	github.com/sergi/go-diff v1.2.0 // indirect
-	github.com/sigstore/cosign v1.13.1 // indirect
+	github.com/sigstore/cosign v1.13.2 // indirect
 	github.com/sigstore/rekor v1.2.0 // indirect
 	github.com/sigstore/sigstore v1.6.4 // indirect
 	github.com/sirupsen/logrus v1.9.0 // indirect