Other README updates for better dark mode compatibility

README.md

@@ -3,7 +3,7 @@
 Render markdown on the CLI, with _pizzazz_!
 
 <p align="center">
-    <img src="https://stuff.charm.sh/glow-github.gif" alt="Glow Logo">
+    <img src="https://stuff.charm.sh/glow/glow-banner-github.gif" alt="Glow Logo">
     <a href="https://github.com/charmbracelet/glow/releases"><img src="https://img.shields.io/github/release/charmbracelet/glow.svg" alt="Latest Release"></a>
     <a href="https://pkg.go.dev/github.com/charmbracelet/glow?tab=doc"><img src="https://godoc.org/github.com/golang/gddo?status.svg" alt="GoDoc"></a>
     <a href="https://github.com/charmbracelet/glow/actions"><img src="https://github.com/charmbracelet/glow/workflows/build/badge.svg" alt="Build Status"></a>
@@ -209,7 +209,7 @@ machine and not our server, so we never see any unencrypted data.
 
 Part of [Charm](https://charm.sh).
 
-<a href="https://charm.sh/"><img alt="the Charm logo" src="https://stuff.charm.sh/charm-badge.jpg" width="400"></a>
+<a href="https://charm.sh/"><img alt="The Charm logo" src="https://stuff.charm.sh/charm-badge-unrounded.jpg" width="400"></a>
 
 Charm热爱开源! / Charm loves open source!