Add individual donors > 50$ (#124)

Author: Mariatta

src/components/sponsors_gallery.astro

@@ -129,6 +129,18 @@ const individuals = [
   {
     name: "Vassiliki Dalakiari",
     url: "https://pretalx.com/pyladiescon-2025/speaker/8T7CFD/"
+  },
+  {
+    name: "Jannis Leidel",
+  },
+  {
+    name: "Reshama Shaikh",
+  },
+  {
+    name: "Priyanka Gagneja",
+  },
+  {
+    name: "Christina Wofford",
   }
 ];
 const media_partners = [