fix image markup

content/what-is-a-data-standard.md

@@ -12,7 +12,7 @@ Each specification provides a set of rules and guidelines for producing and orga
 
 This diagram shows how data specifications are the basis for effective digital ecosystems. Data specifications support the creation of consistent, usable and valuable data. This data can then be relied on to deliver tools and services that satisfy the specific needs of a wide variety of differing users.
 
-<img class="app-img" src="https://digital-land.github.io/images/diagrams/data-standards-in-effective-digital-ecosystems.png" alt="This diagram shows how data specifications are the basis for effective digital ecosystems. Data specifications support the creation of consistent, usable and valuable data. This data can then be relied on to deliver tools and services that satisfy the specific needs of a wide variety of differing users.
+<img class="app-img" src="https://digital-land.github.io/images/diagrams/data-standards-in-effective-digital-ecosystems.png" alt="This diagram shows how data specifications are the basis for effective digital ecosystems. Data specifications support the creation of consistent, usable and valuable data. This data can then be relied on to deliver tools and services that satisfy the specific needs of a wide variety of differing users.">
 
 <p class="govuk-body govuk-!-font-size-14"><a href="https://digital-land.github.io/images/diagrams/data-standards-in-effective-digital-ecosystems.png" class="govuk-link govuk-link--text-colour">See full size version</a>.</p>