Update terminal.integrated.shell.linux config in devcontainer.json (microsoft#47192)

The previous `"terminal.integrated.shell.linux"` configuration is deprecated. 

This is the new way of setting this configuration

Author: mohsen1

.devcontainer/devcontainer.json

@@ -7,7 +7,13 @@
         }
     },
     "settings": {
-        "terminal.integrated.shell.linux": "/bin/bash"
+        "terminal.integrated.defaultProfile.linux": "bash",
+        "terminal.integrated.profiles.linux": {
+            "bash": {
+                "path": "/bin/bash",
+                "icon": "terminal-bash",
+            },
+        },
     },
     "extensions": [
         "dbaeumer.vscode-eslint"