Fix documentation for git_blob_filter_options
diff --git a/include/git2/blob.h b/include/git2/blob.h
index 29588ec..0c6372c 100644
--- a/include/git2/blob.h
+++ b/include/git2/blob.h
@@ -119,7 +119,7 @@ typedef enum {
/**
* The options used when applying filter options to a file.
*
- * Initialize with `GIT_BLOB_FILTER_OPTIONS_VERSION`.
+ * Initialize with `GIT_BLOB_FILTER_OPTIONS_INIT`.
*
*/
typedef struct {