Update index.html

Author: Gmac4247

index.html

@@ -1474,6 +1474,7 @@ <h3 itemprop="name" style="margin:7px">Trigonometry</h3>
 <div itemscope itemtype="https://schema.org/LearningResource https://schema.org/MathSolver">
 <meta itemprop="name" content="Core Geometric System ™">
 <meta itemprop="url" content="https://basic-geometry.github.io">
+<meta itemprop="sameAs" content="https://basic-geometry.pages.dev">
 <meta itemprop="inLanguage" content="en">
 <meta itemprop="accessibilityHazard" content="none">
 <meta itemprop="accessibilitySummary" content="Equations with figures and explanations">