Bump fxamacker/cbor to stream-mode based on v2.9.0

This commit bumps fxamacker/cbor to the latest version of
its feature/stream-mode branch (based on v2.9.0 release).

Author: fxamacker

go.mod

@@ -3,7 +3,7 @@ module github.com/onflow/atree
 go 1.24
 
 require (
-	github.com/fxamacker/cbor/v2 v2.8.1-0.20250402194037-6f932b086829
+	github.com/fxamacker/cbor/v2 v2.9.1-0.20251019205732-39888e6be013
 	github.com/fxamacker/circlehash v0.3.0
 	github.com/stretchr/testify v1.11.1
 	github.com/zeebo/blake3 v0.2.4

go.sum

@@ -1,7 +1,7 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/fxamacker/cbor/v2 v2.8.1-0.20250402194037-6f932b086829 h1:qOglMkJ5YBwog/GU/NXhP9gFqxUGMuqnmCkbj65JMhk=
-github.com/fxamacker/cbor/v2 v2.8.1-0.20250402194037-6f932b086829/go.mod h1:vM4b+DJCtHn+zz7h3FFp/hDAI9WNWCsZj23V5ytsSxQ=
+github.com/fxamacker/cbor/v2 v2.9.1-0.20251019205732-39888e6be013 h1:jcwW+JBYGe3qgiPQ4deXaannYxVdxjMw57/dw+gcEfQ=
+github.com/fxamacker/cbor/v2 v2.9.1-0.20251019205732-39888e6be013/go.mod h1:vM4b+DJCtHn+zz7h3FFp/hDAI9WNWCsZj23V5ytsSxQ=
 github.com/fxamacker/circlehash v0.3.0 h1:XKdvTtIJV9t7DDUtsf0RIpC1OcxZtPbmgIH7ekx28WA=
 github.com/fxamacker/circlehash v0.3.0/go.mod h1:3aq3OfVvsWtkWMb6A1owjOQFA+TLsD5FgJflnaQwtMM=
 github.com/klauspost/cpuid/v2 v2.0.12 h1:p9dKCg8i4gmOxtv35DvrYoWqYzQrvEVdjQ762Y0OqZE=