Fix typo

[petryshkaCODE]

Title

Fix typos in multisigs.md and streaming-payments-with-sablier.md

Description

This pull request fixes two typos in the documentation files to improve clarity and professionalism:

1. Corrected "priveledges" to "privileges" in education/governance-frameworks/multisigs.md.
2. Corrected "cancelation" to "cancellation" in proposals/creating-proposals/custom-actions/streaming-payments-with-sablier.md.

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Diff

File: education/governance-frameworks/multisigs.md

- ... execute the proposal using their admin priveledges.
+ ... execute the proposal using their admin privileges.
- Regarding cancelation, all streams in Sablier V2 have a cancelation setting.
+ Regarding cancellation, all streams in Sablier V2 have a cancellation setting.