fix: google analytics

Signed-off-by: Adam Setch <adam.setch@outlook.com>

Author: setchy

src/components/GoogleAnalytics.astro

@@ -7,7 +7,7 @@ const GTAG_SRC = `https://www.googletagmanager.com/gtag/js?id=${GTAG_ID}`;
 
 <!-- Google tag (gtag.js) -->
 <script async src={GTAG_SRC}></script>
-<script>
+<script define:vars={{ GTAG_ID }}>
 window.dataLayer = window.dataLayer || [];
 function gtag() {
   // biome-ignore lint/complexity/noArguments: keep arguments object as per gtag.js spec