docs: fix your-icrc-ledger-canister-id is principal

Signed-off-by: David Dal Busco <david.dalbusco@outlook.com>

Author: peterpeterparker

docs/reference/functions/typescript/canisters.mdx

@@ -141,7 +141,7 @@ import { Principal } from "@icp-sdk/core/principal";
 
 export const onExecute = async () => {
   const ledger = new IcrcLedgerCanister({
-    canisterId: "your-icrc-ledger-canister-id"
+    canisterId: Principal.fromText("your-icrc-ledger-canister-id")
   });
 
   const balance = await ledger.icrc1BalanceOf({
@@ -188,7 +188,7 @@ import { Principal } from "@icp-sdk/core/principal";
 
 export const onExecute = async () => {
   const ledger = new IcrcLedgerCanister({
-    canisterId: "your-icrc-ledger-canister-id"
+    canisterId: Principal.fromText("your-icrc-ledger-canister-id")
   });
 
   const result = await ledger.icrc1Transfer({
@@ -246,7 +246,7 @@ import { Principal } from "@icp-sdk/core/principal";
 
 export const onExecute = async () => {
   const ledger = new IcrcLedgerCanister({
-    canisterId: "your-icrc-ledger-canister-id"
+    canisterId: Principal.fromText("your-icrc-ledger-canister-id")
   });
 
   const result = await ledger.icrc2TransferFrom({
@@ -305,7 +305,7 @@ import { Principal } from "@icp-sdk/core/principal";
 
 export const onExecute = async () => {
   const ledger = new IcrcLedgerCanister({
-    canisterId: "your-icrc-ledger-canister-id"
+    canisterId: Principal.fromText("your-icrc-ledger-canister-id")
   });
 
   const result = await ledger.icrc2Approve({