seo improvements

(i don’t know what i’m doing)

index.html

@@ -4,15 +4,15 @@
  <meta charset="UTF-8" />
  <meta
  name="description"
- content="A simple and fast open-source OptiFine alternative."
+ content="Improve your FPS and quality-of-life with Additive, the simple and fast open-source OptiFine alternative modpack for Minecraft. Built on Fabric."
  />
  <meta
  name="keywords"
  content="Additive, Minecraft, OptiFine, Mod, Modpack, Fabric"
  />
  <meta name="author" content="intergrav" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
- <title>Additive</title>
+ <title>Additive Modpack for Minecraft</title>
  <link
  rel="stylesheet"
  href="https://cdn.jsdelivr.net/npm/@intergrav/dev.css@3"