Remove accordion <sup> examples

These examples were added to test a different combination of HTML elements in the
accordion component. However, the <sup> element specifically pushes text in the
accordion out of line and therefore requires additional styling if it's going to be
used (vertical-align: top). We also don't think it's likely that a user would want
to use <sup> inside the summary line.

This commit removes the <sup> from the accordion examples. The existing examples still
test the accordion when passing in HTML content, so that is still covered.

app/views/full-page-examples/campaign-page/index.njk

@@ -109,7 +109,7 @@ notes: >-
               },
               expanded: true,
               content: {
-                html: "<p class='govuk-body'>This is the content for Staying for the<sup>1</sup> web.</p>"
+                html: "<p class='govuk-body'>This is the content for Staying for the web.</p>"
               }
             },
             {
@@ -165,7 +165,7 @@ notes: >-
                 text: "Providing assisted digital support"
               },
               summary: {
-                html: "<span class='govuk-!-font-weight-regular'>Helping people who don't have the skills or access to use a service.<sup>1</sup></span>"
+                html: "<span class='govuk-!-font-weight-regular'>Helping people who don't have the skills or access to use a service.</span>"
               },
               content: {
                 html: "<ul class='govuk-list'><li><a class='govuk-link' href='#'>Making your service accessible: an introduction</a></li><li><a class='govuk-link' href='#'>Understanding WCAG 2.1</a></li><li><a class='govuk-link' href='#'>Getting an accessibility audit</a></li><li><a class='govuk-link' href='#'>Testing for accessibility</a></li><li><a class='govuk-link' href='#'>Publishing information about your service's accessibility</a></li></ul>"

src/govuk/components/accordion/accordion.yaml

@@ -106,9 +106,9 @@ examples:
               <li>Example item 1</li>
             </ul>
       - heading:
-         text: Praesent faucibus leo feugiat libero pharetra lacinia. Aliquam aliquet ante vitae mollis vestibulum. 
+         text: Praesent faucibus leo feugiat libero pharetra lacinia. Aliquam aliquet ante vitae mollis vestibulum.
         summary:
-          html: <span class="govuk-!-font-weight-regular">Maecenas nec <abbr>est</abbr> sapien<sup>1</sup>. Etiam varius luctus mauris non porttitor. </span>
+          html: <span class="govuk-!-font-weight-regular">Maecenas nec <abbr>est</abbr> sapien. Etiam varius luctus mauris non porttitor. </span>
         content:
           html: |
             <ul class="govuk-list govuk-list--bullet">