build: upgrade the version of oras-go (#105)

Signed-off-by: Xiaoxuan Wang <wangxiaoxuan119@gmail.com>

go.mod

@@ -2,10 +2,10 @@ module github.com/oras-project/oras-credentials-go
 
 go 1.19
 
-require oras.land/oras-go/v2 v2.3.1-0.20230925030825-cb8c8bc3075c
+require oras.land/oras-go/v2 v2.4.0
 
 require (
 	github.com/opencontainers/go-digest v1.0.0 // indirect
-	github.com/opencontainers/image-spec v1.1.0-rc4 // indirect
-	golang.org/x/sync v0.3.0 // indirect
+	github.com/opencontainers/image-spec v1.1.0-rc6 // indirect
+	golang.org/x/sync v0.6.0 // indirect
 )

go.sum

@@ -1,8 +1,8 @@
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
-github.com/opencontainers/image-spec v1.1.0-rc4 h1:oOxKUJWnFC4YGHCCMNql1x4YaDfYBTS5Y4x/Cgeo1E0=
-github.com/opencontainers/image-spec v1.1.0-rc4/go.mod h1:X4pATf0uXsnn3g5aiGIsVnJBR4mxhKzfwmvK/B2NTm8=
-golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
-golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
-oras.land/oras-go/v2 v2.3.1-0.20230925030825-cb8c8bc3075c h1:znOn5Gb/vfBI/rvruoeqUHyJEfi9woL6r/IvqnFpqRQ=
-oras.land/oras-go/v2 v2.3.1-0.20230925030825-cb8c8bc3075c/go.mod h1:LTHGmKO431CaOWkqgadzYq0sEixlO+EN/zShuWvT1Yg=
+github.com/opencontainers/image-spec v1.1.0-rc6 h1:XDqvyKsJEbRtATzkgItUqBA7QHk58yxX1Ov9HERHNqU=
+github.com/opencontainers/image-spec v1.1.0-rc6/go.mod h1:W4s4sFTMaBeK1BQLXbG4AdM2szdn85PY75RI83NrTrM=
+golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
+golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+oras.land/oras-go/v2 v2.4.0 h1:i+Wt5oCaMHu99guBD0yuBjdLvX7Lz8ukPbwXdR7uBMs=
+oras.land/oras-go/v2 v2.4.0/go.mod h1:osvtg0/ClRq1KkydMAEu/IxFieyjItcsQ4ut4PPF+f8=