add missing links to central procurement page

compendium-frontend/src/components/sidebar/PolicySidebar.tsx

@@ -16,6 +16,9 @@ const PolicySidebar = () => {
             <Link to="/business-continuity">
                 <span>NREN Business Continuity Planning</span>
             </Link>
+            <Link to="/central-procurement">
+                <span>Central Procurement of Software</span>
+            </Link>
             <Link to="/crisis-management">
                 <span>Crisis Management Procedures</span>
             </Link>

compendium-frontend/src/pages/CompendiumData.tsx

@@ -83,6 +83,9 @@ function CompendiumData(): ReactElement {
                         <Link to="/business-continuity" className="link-text-underline">
                             <span>NREN Business Continuity Planning</span>
                         </Link>
+                        <Link to="/central-procurement" className="link-text-underline">
+                            <span>Central Procurement of Software</span>
+                        </Link>
                         <Link to="/crisis-management" className="link-text-underline">
                             <span>Crisis Management Procedures</span>
                         </Link>