Update Land4Health training PDF and enable section

Replaced the Land4Health PDF link with the new workshop file and enabled the Land4Health section in the UI. Related links for Land4Health are now commented out. Added l4h_workshop.pdf to the public training directory.

Author: dirreno

app/trainings/page.tsx

@@ -41,10 +41,10 @@ function SubButtons({ section }: { section: Section }) {
       ],
     },
     land4health: {
-      pdf: '/cards/toolkits/land4health-installation.pdf',
+      pdf: '/training/l4h_workshop.pdf',
       related: [
-        { label: 'Land4Health dataset', href: '/cards/toolkits/land4health-dataset.zip', isFile: true },
-        { label: 'Documentation', href: 'https://example.org/land4health' },
+        //{ label: 'Land4Health presentation', href: '/training/l4h_workshop.pdf', isFile: true },
+        //{ label: 'Documentation', href: 'https://example.org/land4health' },
       ],
     },
     socio4health: {
@@ -118,7 +118,7 @@ export default function Page() {
   const disabledMap: Record<Section, boolean> = {
     data4health: false,
     clim4health: false,
-    land4health: true,
+    land4health: false,
     socio4health: true,
     cube4health: true,
   };