backend: fix misspellings

backend/opendrive/opendrive.go

@@ -119,7 +119,7 @@ func (f *Fs) DirCacheFlush() {
 	f.dirCache.ResetRoot()
 }
 
-// NewFs contstructs an Fs from the path, bucket:path
+// NewFs constructs an Fs from the path, bucket:path
 func NewFs(name, root string, m configmap.Mapper) (fs.Fs, error) {
 	// Parse config into Options struct
 	opt := new(Options)