chore: fix some comments (#4952)

## Describe your changes

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fix some comments

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- [ ] If this code contains consensus-breaking changes, I have added the
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  > REPLACE THIS TEXT WITH RATIONALE (CAN BE BRIEF)

Signed-off-by: clonefetch <[email protected]>

crates/custody/src/policy.rs

@@ -39,7 +39,7 @@ pub trait Policy {
 /// A set of basic spend authorization policies.
 ///
 /// These policies are intended to be simple enough that they can be written by hand in a config
-/// file.  More complex policy logic than than should be implemented by a custom implementation of
+/// file.  More complex policy logic than should be implemented by a custom implementation of
 /// the [`Policy`] trait.
 ///
 /// These policies do not permit validator votes or validator definition updates, so a custom policy

docs/protocol/src/shielded_pool/action/output.md

@@ -9,7 +9,7 @@ The body of an `Output` has four parts:
 1. A `NotePayload`, which consists of the note commitment, the `NoteCiphertext`, and an ephemeral public key used to encrypt the note;
 2. A balance commitment, which commits to the value balance of the output note;
 3. The ovk wrapped key, which enables the _sender_ to later decrypt the `NoteCiphertext` using their `OutgoingViewingKey`;
-4. The wrapped memo key, which enables one who can decrypt the `NoteCiphertext` to additionally decrypt the [`MemoCiphertext`](../../transactions/memo.md) on the tranasction.
+4. The wrapped memo key, which enables one who can decrypt the `NoteCiphertext` to additionally decrypt the [`MemoCiphertext`](../../transactions/memo.md) on the transaction.
 
 ## Invariants
 

docs/protocol/src/transactions/actions.md

@@ -1,6 +1,6 @@
 # Action Reference
 
-This page is a quick-reference list of transaction actions. Not all actions have proof statements, as only some actions perfom shielded state changes. Actions with proof statements are additionally listed separately for reference.
+This page is a quick-reference list of transaction actions. Not all actions have proof statements, as only some actions perform shielded state changes. Actions with proof statements are additionally listed separately for reference.
 
 ## Actions by Proof Statement