Add semicolon for consistency (#890)

Author: morinokami

pages/docs/manual/latest/overview.mdx

@@ -127,7 +127,7 @@ canonical: "/docs/manual/latest/overview"
       const myFun = (x, y) => {
         const doubleX = x + x;
         const doubleY = y + y;
-        return doubleX + doubleY
+        return doubleX + doubleY;
       };
       ```
       </td>

pages/docs/manual/v10.0.0/overview.mdx

@@ -125,7 +125,7 @@ canonical: "/docs/manual/latest/overview"
   <pre><code>{`const myFun = (x, y) => {
   const doubleX = x + x;
   const doubleY = y + y;
-  return doubleX + doubleY
+  return doubleX + doubleY;
 };`}</code></pre>
       </td>
       <td>

pages/docs/manual/v8.0.0/overview.mdx

@@ -117,7 +117,7 @@ canonical: "/docs/manual/latest/overview"
       const myFun = (x, y) => {
         const doubleX = x + x;
         const doubleY = y + y;
-        return doubleX + doubleY
+        return doubleX + doubleY;
       };
       ```
       </td>

pages/docs/manual/v9.0.0/overview.mdx

@@ -115,7 +115,7 @@ canonical: "/docs/manual/latest/overview"
       const myFun = (x, y) => {
         const doubleX = x + x;
         const doubleY = y + y;
-        return doubleX + doubleY
+        return doubleX + doubleY;
       };
       ```
       </td>