Add HubSpot tracking script to Head component.

Integrated the HubSpot tracking script with the `Head.astro` component to enable analytics and tracking functionality. The script is added inline with async and defer attributes for optimized performance.

Author: khalidabuhakmeh

src/components/Head.astro

@@ -8,4 +8,4 @@ const openGraphImageUrl = getImagePath({ url, site });
 
 {head.map(({ tag: Tag, attrs, content }) => <Tag {...attrs} set:html={content} />)}
 {openGraphImageUrl && (<meta property="og:image" content={openGraphImageUrl} />)}
-
+<script is:inline type="text/javascript" id="hs-script-loader" async defer src="//js.hs-scripts.com/47428297.js"></script>