chore: fix typo (#1121)

Signed-off-by: guoguangwu <[email protected]>

Author: testwill

test/e2e/suite/command/attach.go

@@ -60,7 +60,7 @@ var _ = Describe("ORAS beginners:", func() {
 				ExpectFailure().MatchErrKeyWords("Error: no blob or manifest annotation are provided").Exec()
 		})
 
-		It("should fail if distribution spec is unkown", func() {
+		It("should fail if distribution spec is unknown", func() {
 			ORAS("attach", "--artifact-type", "oras/test", RegistryRef(ZOTHost, ImageRepo, foobar.Tag), "--distribution-spec", "???").
 				ExpectFailure().MatchErrKeyWords("unknown distribution specification flag").Exec()
 		})

test/e2e/suite/command/push.go

@@ -328,7 +328,7 @@ var _ = Describe("Remote registry users:", func() {
 
 var _ = Describe("OCI image layout users:", func() {
 	tag := "e2e"
-	When("pushing to registy without OCI artifact support", func() {
+	When("pushing to registry without OCI artifact support", func() {
 		statusKeys := []match.StateKey{
 			foobar.ImageConfigStateKey("application/vnd.oci.empty.v1+json"),
 			foobar.FileBarStateKey,