Clarify encoding of hash in the api docs

api/methods/getLatestLedger.mdx

@@ -15,6 +15,6 @@ For finding out the current latest known ledger of this node. This is a subset o
 ## Returns
 
 - `<object>`
-  - `id`: `<hash>` - hash of the latest ledger
+  - `id`: `<hash>` - hash of the latest ledger as a hex-encoded string
   - `protocolVersion`: `<number>`
   - `sequence`: `<number>`

api/methods/getTransactionStatus.mdx

@@ -13,7 +13,7 @@ Clients will poll this to tell when the transaction has been completed.
 
 ## Parameters
 
-- `<hash>` - transaction hash to query
+- `<hash>` - transaction hash to query, as a hex-encoded string
 
 ## Returns
 
@@ -104,4 +104,4 @@ Clients will poll this to tell when the transaction has been completed.
     }
   }
 }
-```
+```

api/methods/requestAirdrop.mdx

@@ -19,7 +19,7 @@ Maybe we could replace this with a 'friendbotUrl' field in `getNetwork` method?
 ## Returns
 
 - `<object>`
-  - `transactionId`: `<hash>` - Transaction id of the transfer.
+  - `transactionId`: `<hash>` - Transaction id of the transfer as a hex-encoded string.
 
 ## Errors