Fix typos in comments

[kilavvy]

Description:

This PR fixes a couple of typos found in code comments.

- `quickwit/quickwit-directories/src/hot_directory.rs`: corrected `dictionray` to `dictionary`.
- `quickwit/quickwit-storage/src/timeout_and_retry_storage.rs`: corrected `agressively` to `aggressively`.

[fmassot]

thanks @kilavvy !