Update screenshot as svg

Author: wcampbell0x2a

README.md

@@ -9,7 +9,7 @@ GDB TUI Dashboard. Connect remotely with gdb when you don't have a working `gdbs
 * **No python requirements**: Many vendors ship `gdb` without python support.
 * **Architecture agnostic**: `heretek` only uses information given by `gdb`, no extra code required!
 
-![screenshot](images/screenshot.png)
+![screenshot](images/screenshot.svg)
 
 ## Build
 Either build from published source in crates.io.

RELEASE.md

@@ -2,5 +2,5 @@
 ```
 $ cargo r --profile=dist -- --cmds "test-sources/test.source"
 $ wmctrl -lx
-$ import -window {id} images/screenshot.png
+$ import -window {id} images/screenshot.svg
 ```