Update Open Graph image URLs in HTML files for consistent asset loading

Author: VincentLoy

docs/dist/index.html

@@ -15,7 +15,7 @@
 
     <meta property="og:title" content="simplyCountdown.js - A Tiny Javascript Countdown Library">
     <meta property="og:description" content="A dead simple and lightweight countdown library for your web projects">
-    <meta property="og:image" content="./images/simplycountdown_web.png">
+    <meta property="og:image" content="https://vincentloy.github.io/simplyCountdown.js/images/simplycountdown_web.png">
     <meta property="og:type" content="website">
     <meta property="og:url" content="https://vincentloy.github.io/simplyCountdown.js/">
     <meta name="twitter:card" content="summary_large_image">

docs/src/index.html

@@ -15,7 +15,7 @@
 
     <meta property="og:title" content="simplyCountdown.js - A Tiny Javascript Countdown Library">
     <meta property="og:description" content="A dead simple and lightweight countdown library for your web projects">
-    <meta property="og:image" content="./images/simplycountdown_web.png">
+    <meta property="og:image" content="https://vincentloy.github.io/simplyCountdown.js/images/simplycountdown_web.png">
     <meta property="og:type" content="website">
     <meta property="og:url" content="https://vincentloy.github.io/simplyCountdown.js/">
     <meta name="twitter:card" content="summary_large_image">