fix: update smart saver link url

Author: sxalekhin

src/components/molecules/ZopaFooter/ZopaFooter.tsx

@@ -189,7 +189,7 @@ const ZopaFooterLinks = () => {
             <StyledLink href="https://www.zopa.com/credit-card">Credit cards</StyledLink>
           </li>
           <li className="mb-4">
-            <StyledLink href="https://www.zopa.com/smart-saver">Smart Saver</StyledLink>
+            <StyledLink href="https://www.zopa.com/savings">Smart Saver</StyledLink>
           </li>
           <li>
             <StyledLink href="https://www.zopa.com/savings-accounts">Fixed Term Savings</StyledLink>

src/components/molecules/ZopaFooter/__snapshots__/ZopaFooter.test.tsx.snap

@@ -483,7 +483,7 @@ exports[`<ZopaFooter /> renders the component with no a11y violations 1`] = `
             <a
               class="c6 c7"
               color="#3B46C4"
-              href="https://www.zopa.com/smart-saver"
+              href="https://www.zopa.com/savings"
             >
               Smart Saver
             </a>