Update README.md

updated vulkan-sdk install info for Ubuntu 22.04
sosie-js · Dec 29, 2022 · dda97b7 · dda97b7
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diff --git a/README.md b/README.md
@@ -39,7 +39,16 @@ sudo apt update
 sudo apt install vulkan-sdk
 ```
 on Ubuntu 20.04:
+```
 wget -qO - http://packages.lunarg.com/lunarg-signing-key-pub.asc | sudo apt-key add -
 sudo wget -qO /etc/apt/sources.list.d/lunarg-vulkan-focal.list http://packages.lunarg.com/vulkan/lunarg-vulkan-focal.list
 sudo apt update
 sudo apt install vulkan-sdk
+```
+on Ubuntu 22.04:
+```
+wget -qO- https://packages.lunarg.com/lunarg-signing-key-pub.asc | sudo tee /etc/apt/trusted.gpg.d/lunarg.asc
+sudo wget -qO /etc/apt/sources.list.d/lunarg-vulkan-jammy.list http://packages.lunarg.com/vulkan/lunarg-vulkan-jammy.list
+sudo apt update
+sudo apt install vulkan-sdk
+```