Replace smart quotes in docs (#3424)

The smart quotes were causing the [Teacher Services Tech
Docs](https://github.com/DFE-Digital/teacher-services-tech-docs/) build
to fail, due to an encoding mismatch.

Co-authored-by: Steven Lorek <[email protected]>

docs/architecture-decisions/0008-use-govuk-verify-for-claiment-identity-assurance.md

@@ -14,19 +14,19 @@ payments are made to eligible claimants only and to minimise fraudulent claims.
 ## Decision
 
 We will integrate with the [GOVUK Verify](https://www.verify.service.gov.uk/)
-service, a ‘secure way to prove who you are online’.
+service, a 'secure way to prove who you are online'.
 
-GOVUK Verify recommend any services that ‘gives users money or benefits’ use
-‘Level of Assurance 2’ or ‘LOA2’, we will follow this guidance.
+GOVUK Verify recommend any services that 'gives users money or benefits' use
+'Level of Assurance 2' or 'LOA2', we will follow this guidance.
 
 [Understand Level of Assurance](https://www.verify.service.gov.uk/understand-levels-of-assurance/)
 
 ## Consequences
 
 Using GOVUK Verify requires DfE to sign GOVUK Verify’s agreements.
 
-Integrating with GOVUK Verify requires the hosting and management of a ‘Verify
-Service Provider’ or VSP. DfE only needs a single VSP to integrate GOVUK Verify
+Integrating with GOVUK Verify requires the hosting and management of a 'Verify
+Service Provider' or VSP. DfE only needs a single VSP to integrate GOVUK Verify
 with any number of services, including ours.
 
 There will be on-going management of the VSP including security key rotation on

docs/architecture-decisions/0009-capture-teacher-reference-number.md

@@ -15,7 +15,7 @@ eligibility criteria.
 ## Decision
 
 To aid DfE in the process of validating a claimant’s qualifications, we will
-collect the claimant’s ‘Teacher Reference Number’ or TRN.
+collect the claimant's 'Teacher Reference Number' or TRN.
 
 With the TRN, DfE can use the Database of Qualified Teachers
 ([DQT](https://teacherservices.education.gov.uk/SelfService/Login)) to validate

docs/architecture-decisions/0011-payroll-information-to-be-downloaded-directly-by-payroll-provider.md

@@ -22,7 +22,7 @@ the service’s back-office, which uses DfE's single sign-on service
 
 The payroll provider will be set up with their own organisation in DfE Sign In
 so that they can manage their own user access and be responsible for
-movers/leavers. Their users will only support a specific “Payroll operator”
+movers/leavers. Their users will only support a specific 'Payroll operator'
 role. This role will only allow the downloading of the monthly payroll file and
 nothing else within the back-office.