chore: fixed typos in documentation (matter-labs#603)

## What ❔

- fixed typos in documentation

## Checklist

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- [x] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [x] Tests for the changes have been added / updated.
- [x] Documentation comments have been added / updated.
- [x] Code has been formatted via `zk fmt` and `zk lint`.
- [x] Spellcheck has been run via `cargo spellcheck
--cfg=./spellcheck/era.cfg --code 1`.

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Co-authored-by: perekopskiy <[email protected]>

docs/advanced/pubdata.md

@@ -194,4 +194,4 @@ the writes will be repeated ones.
 Given the structure above, there is a tool, created by the [Equilibrium Team](https://equilibrium.co/) that solely uses
 L1 pubdata for reconstructing the state and verifying that the state root on L1 can be created using pubdata. A link to
 the repo can be found [here](https://github.com/eqlabs/zksync-state-reconstruct). The way the tool works is by parsing
-out all the L1 pubdata for an executed batch, compaing the state roots after each batch is processed.
+out all the L1 pubdata for an executed batch, comparing the state roots after each batch is processed.