Fix broken references to Linux images and update README

Signed-off-by: Marcus Crane <marcus@utf9k.net>

Author: marcus-crane

.vitepress/config.mts

@@ -6,6 +6,7 @@ export default defineConfig({
   description: "Getting highlights off of your Kobo is very fiddly on a technical level. October is a community-driven desktop application that makes it really simple to send them to Readwise. 100% open source with support for Windows, macOS and Linux!",
   srcDir: "./docs",
   srcExclude: [
+    "assets", // exists for legacy reasons -- linux deb points to github files
     "node_modules",
     "contributions/*.md",
     "miscellaneous/limitations.md",

README.md

@@ -3,9 +3,9 @@
 </div>
 
 # October
-> Easily submit your Kobo highlights to Readwise (and eventually more)
+> A desktop application that can send your Kobo highlights to Readwise in a couple of clicks
 
-![](./docs/assets/heroimage.png)
+![](./docs/public/heroimage.png)
 
 ## What is October?