Update social share cover broken URL

Author: trungvose

src/assets/readme/tetris-social-cover.png

@@ -25,14 +25,14 @@
     <meta property="og:url" content="https://tetris.trungk18.com/">
     <meta property="og:title" content="Angular Tetris built with Angular and Akita - by trungk18">
     <meta property="og:description" content="A childhood memory Tetris game built with Angular 10 and Akita.">
-    <meta property="og:image" content="assets/img/tech-stack.png">
+    <meta property="og:image" content="assets/readme/tetris-social-cover.png">
 
     <!-- Twitter -->
     <meta property="twitter:card" content="summary_large_image">
     <meta property="twitter:url" content="https://tetris.trungk18.com/">
     <meta property="twitter:title" content="Angular Tetris built with Angular and Akita - by trungk18">
     <meta property="twitter:description" content="A childhood memory Tetris game built with Angular 10 and Akita.">
-    <meta property="twitter:image" content="assets/img/tech-stack.png">
+    <meta property="twitter:image" content="assets/readme/tetris-social-cover.png">
 
     <link rel="image_src" href="assets/favicon.png" type="image/png">
     <link rel="shortcut icon" href="assets/favicon.png" type="image/png">

src/index.html

@@ -25,14 +25,14 @@
     <meta property="og:url" content="https://tetris.trungk18.com/">
     <meta property="og:title" content="Angular Tetris built with Angular and Akita - by trungk18">
     <meta property="og:description" content="A childhood memory Tetris game built with Angular 10 and Akita.">
-    <meta property="og:image" content="assets/img/tech-stack.png">
+    <meta property="og:image" content="assets/readme/tetris-social-cover.png">
 
     <!-- Twitter -->
     <meta property="twitter:card" content="summary_large_image">
     <meta property="twitter:url" content="https://tetris.trungk18.com/">
     <meta property="twitter:title" content="Angular Tetris built with Angular and Akita - by trungk18">
     <meta property="twitter:description" content="A childhood memory Tetris game built with Angular 10 and Akita.">
-    <meta property="twitter:image" content="assets/img/tech-stack.png">
+    <meta property="twitter:image" content="assets/readme/tetris-social-cover.png">
 
     <link rel="image_src" href="assets/favicon.png" type="image/png">
     <link rel="shortcut icon" href="assets/favicon.png" type="image/png">