fix: Correct meta descriptions

Author: HonzaTuron

docusaurus.config.js

@@ -370,6 +370,11 @@ module.exports = {
                 result.frontMatter.image ??= ogImageURL.toString();
             }
 
+            // Extract the first sentence (ending with . ! or ?) even if it spans multiple lines
+            const contentText = result.content.replace(/\n+/g, ' ').replace(/\s+/g, ' ').trim();
+            const sentenceMatch = contentText.match(/^(.*?[.!?])\s/);
+            result.frontMatter.description = sentenceMatch ? sentenceMatch[1].trim() : contentText;
+
             return result;
         },
     },