Fix some documentation issues

private/bufpkg/bufmodule/commit_key.go

@@ -42,7 +42,7 @@ type CommitKey interface {
 	// DigestType returns the DigestType of the Commit.
 	//
 	// Note this is *not* a bufcas.Digest - this is a Digest. bufcas.Digests are a lower-level
-	// type that just deal in terms of files and content. A Moduleigest is a specific algorithm
+	// type that just deal in terms of files and content. A ModuleDigest is a specific algorithm
 	// applied to a set of files and dependencies.
 	DigestType() DigestType
 

private/bufpkg/bufmodule/module_data.go

@@ -46,15 +46,13 @@ type ModuleData interface {
 
 	// BufYAMLObjectData gets the v1beta1 or v1 buf.yaml ObjectData.
 	//
-	// This is always present, even if the Module was created from a v2 buf.yaml file. The BSR will
-	// synthesize a value.
+	// This is only set if the Module was created from a v1 or v1beta1 buf.yaml file.
 	//
 	// This is used for digest calcuations. It is not used otherwise.
 	V1Beta1OrV1BufYAMLObjectData() (ObjectData, error)
 	// BufYAMLObjectData gets the v1beta1 or v1 buf.lock ObjectData.
 	//
-	// This is always present, even if the Module was created from a v2 buf.yaml file. The BSR will
-	// synthesize a value.
+	// This is only set if the Module was created from a v1 or v1beta1 buf.lock file.
 	//
 	// This is used for digest calcuations. It is not used otherwise.
 	V1Beta1OrV1BufLockObjectData() (ObjectData, error)

private/bufpkg/bufmodule/module_key.go

@@ -47,7 +47,7 @@ type ModuleKey interface {
 	// Digest returns the Module digest.
 	//
 	// Note this is *not* a bufcas.Digest - this is a Digest. bufcas.Digests are a lower-level
-	// type that just deal in terms of files and content. A Moduleigest is a specific algorithm
+	// type that just deal in terms of files and content. A ModuleDigest is a specific algorithm
 	// applied to a set of files and dependencies.
 	Digest() (Digest, error)