fix: academy links should be absolute (#1575)

Closes #1573

Author: B4nan

sources/academy/homepage_content.json

@@ -2,39 +2,39 @@
     "Beginner courses": [
         {
             "title": "Web scraping basics for JavaScript devs",
-            "link": "academy/web-scraping-for-beginners",
+            "link": "/academy/web-scraping-for-beginners",
             "description": "Learn how to use JavaScript to extract information from websites in this practical course, starting from the absolute basics.",
             "imageUrl": "/img/academy/intro.svg"
         },
         {
             "title": "Web scraping basics for Python devs",
-            "link": "academy/scraping-basics-python",
+            "link": "/academy/scraping-basics-python",
             "description": "Learn how to use Python to extract information from websites in this practical course, starting from the absolute basics.",
             "imageUrl": "/img/academy/intro.svg"
         },
         {
             "title": "Apify platform",
-            "link": "academy/apify-platform",
+            "link": "/academy/apify-platform",
             "description": "The Apify platform is the best place to run your scrapers and automations in the cloud. Learn what an actor is, how to turn your program into an actor, and how to deploy it.",
             "imageUrl": "/img/academy/apify_platform.png"
         }
     ],
     "Advanced web scraping courses": [
         {
             "title": "API scraping",
-            "link": "academy/api-scraping",
+            "link": "/academy/api-scraping",
             "description": "Learn all about how the professionals scrape various types of APIs with various configurations, parameters, and requirements.",
             "imageUrl": "/img/academy/actors-01.svg"
         },
         {
             "title": "Anti-scraping protections",
-            "link": "academy/anti-scraping",
+            "link": "/academy/anti-scraping",
             "description": "Understand the various anti-scraping measures different sites use to prevent bots from accessing them, and how to appear more human to fix these issues.",
             "imageUrl": "/img/academy/proxy-01.svg"
         },
         {
             "title": "Expert scraping with Apify",
-            "link": "academy/expert-scraping-with-apify",
+            "link": "/academy/expert-scraping-with-apify",
             "description": "After learning the basics of actors, learn to develop pro-level scrapers on the Apify platform with this advanced course.",
             "imageUrl": "/img/academy/enterprise-01.svg"
         }