Add image caption

src/config/pages/dai-news.json

@@ -17,7 +17,8 @@
             "content": "<p>A new minor version 3.3.0 of Field Desktop has been released</p><p>The release introduces new composite input fields and reworks several spatial relations.</p><p>Additionally, in an effort to improve community participation and to streamline the application's localization, a Weblate instance has been setup. Any researcher interested in helping can create an account and start translating into one or more preferred languages at <a href='https://weblate.dainst.org' target='_blank'>weblate.dainst.org</a>. For more information see also our Wiki on <a href='https://github.com/dainst/idai-field/wiki/Translating-Field-Desktop'>Github</a>.",
             "image": {
               "src": "/assets/images/content/news/2023/field-3-3-0_weblate_screenshot.png",
-              "title": "Weblate screenshot"
+              "title": "Weblate screenshot",
+              "caption": "Screenshot of Weblate's project overview"
             }
           },
           "more": {