Update quickstart launch.json to use .NET 8 (#6836)

Author: awright18

tutorials/quickstart/Solution/.vscode/launch.json

@@ -31,7 +31,7 @@
             "name": "ClientUI",
             "type": "coreclr",
             "request": "launch",
-            "program": "${workspaceFolder}/ClientUI/bin/Debug/net6.0/ClientUI.dll",
+            "program": "${workspaceFolder}/ClientUI/bin/Debug/net8.0/ClientUI.dll",
             "args": [],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,
@@ -49,7 +49,7 @@
             "name": "Sales",
             "type": "coreclr",
             "request": "launch",
-            "program": "${workspaceFolder}/Sales/bin/Debug/net6.0/Sales.dll",
+            "program": "${workspaceFolder}/Sales/bin/Debug/net8.0/Sales.dll",
             "args": [],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,
@@ -59,7 +59,7 @@
             "name": "Billing",
             "type": "coreclr",
             "request": "launch",
-            "program": "${workspaceFolder}/Billing/bin/Debug/net6.0/Billing.dll",
+            "program": "${workspaceFolder}/Billing/bin/Debug/net8.0/Billing.dll",
             "args": [],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,
@@ -69,7 +69,7 @@
             "name": "Platform",
             "type": "coreclr",
             "request": "launch",
-            "program": "${workspaceFolder}/Platform/bin/Debug/net6.0/Platform.dll",
+            "program": "${workspaceFolder}/Platform/bin/Debug/net8.0/Platform.dll",
             "args": [],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,
@@ -79,7 +79,7 @@
             "name": "Shipping",
             "type": "coreclr",
             "request": "launch",
-            "program": "${workspaceFolder}/Shipping/bin/Debug/net6.0/Shipping.dll",
+            "program": "${workspaceFolder}/Shipping/bin/Debug/net8.0/Shipping.dll",
             "args": [],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,