Add livepreview repo to endgame notebooks

.vscode/notebooks/endgame.github-issues

@@ -7,7 +7,7 @@
   {
     "kind": 2,
     "language": "github-issues",
-    "value": "$REPOS=repo:microsoft/vscode repo:microsoft/vscode-internalbacklog repo:microsoft/vscode-js-debug repo:microsoft/vscode-remote-release repo:microsoft/vscode-pull-request-github repo:microsoft/vscode-settings-sync-server repo:microsoft/vscode-emmet-helper repo:microsoft/vscode-remotehub repo:microsoft/vscode-jupyter repo:microsoft/vscode-python\r\n\r\n$MILESTONE=milestone:\"July 2021\""
+    "value": "$REPOS=repo:microsoft/vscode repo:microsoft/vscode-internalbacklog repo:microsoft/vscode-js-debug repo:microsoft/vscode-remote-release repo:microsoft/vscode-pull-request-github repo:microsoft/vscode-settings-sync-server repo:microsoft/vscode-emmet-helper repo:microsoft/vscode-remotehub repo:microsoft/vscode-jupyter repo:microsoft/vscode-python repo:microsoft/vscode-livepreview\n\n$MILESTONE=milestone:\"July 2021\""
   },
   {
     "kind": 1,

.vscode/notebooks/my-endgame.github-issues

@@ -7,7 +7,7 @@
   {
     "kind": 2,
     "language": "github-issues",
-    "value": "$REPOS=repo:microsoft/vscode repo:microsoft/vscode-internalbacklog repo:microsoft/vscode-js-debug repo:microsoft/vscode-remote-release repo:microsoft/vscode-pull-request-github repo:microsoft/vscode-settings-sync-server repo:microsoft/vscode-remotehub repo:microsoft/vscode-emmet-helper repo:microsoft/vscode-jupyter repo:microsoft/vscode-python\n\n$MILESTONE=milestone:\"July 2021\"\n\n$MINE=assignee:@me"
+    "value": "$REPOS=repo:microsoft/vscode repo:microsoft/vscode-internalbacklog repo:microsoft/vscode-js-debug repo:microsoft/vscode-remote-release repo:microsoft/vscode-pull-request-github repo:microsoft/vscode-settings-sync-server repo:microsoft/vscode-remotehub repo:microsoft/vscode-emmet-helper repo:microsoft/vscode-jupyter repo:microsoft/vscode-python repo:microsoft/vscode-livepreview\n\n$MILESTONE=milestone:\"July 2021\"\n\n$MINE=assignee:@me"
   },
   {
     "kind": 1,