docs(services/memory): Fix wrong explanation #2002
Merged
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As seen in https://github.com/apache/incubator-opendal/blob/aa8b9e52801947c1799a5efa7107c14e94ec300a/core/src/services/memory/backend.rs#L80 It is implemented based on BTreeMap, rather than HashMap.
And Most key values are paths. Will it become better to use TrieTreeMap?