Fix postCreateCommand failing on yarn GPG error

apt-get update returns non-zero due to broken yarn repo key,
use || true to continue with kubectx installation

Author: kaluzaaa

.devcontainer/devcontainer.json

@@ -9,7 +9,7 @@
 		"ghcr.io/stuartleeks/dev-container-features/azure-cli-persistence:0": {},
 		"ghcr.io/stuartleeks/dev-container-features/shell-history:0": {}
 	},
-	"postCreateCommand": "sudo apt-get update && sudo apt-get install -y kubectx",
+	"postCreateCommand": "sudo apt-get update || true && sudo apt-get install -y kubectx",
 	"customizations": {
 		"vscode": {
 			"extensions": [