fix(devcontainer): qemu cannot access /dev/kvm "failed to initialize kvm: Permission denied"

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

.devcontainer/Dockerfile

@@ -120,3 +120,5 @@ ENV NO_AT_BRIDGE=1
 RUN <<EOF
 echo PATH=$PATH:/workspaces/Fennix/cross/bin >> /etc/profile
 EOF
+
+ENV CHMOD_KVM=1

.devcontainer/devcontainer.json

@@ -32,7 +32,7 @@
 			"type": "bind"
 		},
 		{
-			"source": "${localEnv:XAUTHORITY}",
+			"source": "${env:XAUTHORITY}",
 			"target": "/home/vscode/.Xauthority",
 			"type": "bind"
 		},
@@ -44,6 +44,5 @@
 	],
 	"runArgs": [
 		"--privileged"
-	],
-	"postAttachCommand": "sudo chmod 666 /dev/kvm"
+	]
 }