Apply suggestions from code review

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

docs/lending/guides/loan-writeback/configure.md

@@ -63,15 +63,15 @@ sequenceDiagram
     backend -->> frontend: View configuration
 
     backend -->> codat: Create source account
-    codat -->> backend: source account
+    codat -->> backend: Source account
 
     backend -->> codat: Map source account
     codat -->> backend: Mapped source account
 ```
 
 ### Bank account
 
-The loan writeback process involves two bank accounts:
+The loan writeback process uses two bank accounts:
 - A borrower's business bank account where the money lent is deposited.
 - A lender's bank account, which is a virtual account in the accounting software that serves as a container for lender transactions. This account is created when [setting up the bank feed source account](#bank-feed-source-account).
 

docs/lending/guides/loan-writeback/introduction.md

@@ -102,7 +102,7 @@ In the example, you can also see that each bank feed transaction matches a bank
 
 The lender agrees to provide the SMB with an advance of £800 for a £1000 invoice with a £50 fee. The lender deposits £800 into the SMB's bank account and the SMB's customer pays for the invoice within the payment period.
 
-OUpon receiving payment from the customer, the funds are transferred from the borrower's bank account into the borrower's bank account, settling the loan and associated fees.
+Upon receiving payment from the customer, the funds are transferred from the borrower's bank account into the borrower's bank account, settling the loan and associated fees.
 The lender’s fee is then deducted from this payment.
 
 As a result, the lender's account transactions balance to zero, and the advance and the outstanding amount remain in the borrower's account.