some small fixes that I found (#274)

Author: Dimitri POSTOLOV

.gitignore

@@ -36,3 +36,5 @@ yarn-error.log*
 
 # typescript
 *.tsbuildinfo
+
+.idea/

components/Paragraph.tsx

@@ -10,7 +10,7 @@ export const Paragraph = ({ children, ...props }: ParagraphProps) => {
       sx={{
         mt: Spacing['16px'],
         mb: Spacing['24px'],
-        '&:first-child': { mt: 0 },
+        '&:first-of-type': { mt: 0 },
         '&:last-child': { mb: 0 },
       }}
       {...props}

pages/_app.tsx

@@ -30,7 +30,7 @@ const DEFAULT_SEO_PROPS: DefaultSeoProps = {
   title: 'The Graph Docs',
   description: 'Browse the latest developer documentation including API reference, articles, and sample code',
   openGraph: {
-    site_name: 'The Graph Docs',
+    siteName: 'The Graph Docs',
     type: 'website',
     url: 'https://thegraph.com/docs/',
     locale: defaultLocale,