syntax highlighting after installation

here is my setting.json

{
  "kite.showWelcomeNotificationOnStartup": false,
  "explorer.confirmDelete": false,
  "workbench.colorTheme": "Expressive Theme",
  "workbench.iconTheme": "vscode-icons",
  "css.remoteStyleSheets": [
    "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css"
  ],
  "git.confirmSync": false,
  "python.jediEnabled": false,
  "markdown-preview-enhanced.liveUpdate": true,
  "C_Cpp.updateChannel": "Insiders",
  "files.associations": {
    "*.rmd": "rmd"
    // "*.html": "jinja-html"
  },
  "files.autoSave": "afterDelay",
  "explorer.confirmDragAndDrop": false,
  "liveServer.settings.donotVerifyTags": true,
"liveServer.settings.donotShowInfoMsg": true,
"python.languageServer": "Pylance",
"latex-workshop.message.update.show": false,
"terminal.integrated.fontFamily": "Menlo",
"workbench.statusBar.visible": true,
"editor.renderControlCharacters": true,
"git.suggestSmartCommit": false,
"editor.formatOnSave": true,
"java.help.firstView": "gettingStarted",
"editor.suggestSelection": "first",
"vsintellicode.modify.editor.suggestSelection": "automaticallyOverrodeDefaultValue",
"jupyter.sendSelectionToInteractiveWindow": false,
"jupyter.interactiveWindowMode": "perFile",
"java.configuration.checkProjectSettingsExclusions": false,
"[markdown]": {

  "editor.defaultFormatter": "yzhang.markdown-all-in-one"
},
"diffEditor.ignoreTrimWhitespace": false,
"workbench.activityBar.visible": false,
"java.project.referencedLibraries": [
  "lib/**/*.jar",
  "/opt/homebrew/Cellar/junit-platform-console-standalone-1.7.0-M1.jar"
],
"jupyter.askForKernelRestart": false,
"terminal.integrated.inheritEnv": false,
"jupyter.textOutputLimit": 0,
"workbench.editorAssociations": [
  {
    "viewType": "jupyter.notebook.ipynb",
    "filenamePattern": "*.ipynb"
  }
],
"redhat.telemetry.enabled": true,
"java.project.importOnFirstTimeStartup": "automatic",
"omnisharp.path": "latest",
"omnisharp.monoPath": "/Library/Frameworks/Mono.framework/Versions/Current",
"omnisharp.useGlobalMono": "always",
"window.zoomLevel": 1,
"update.mode": "manual",
}

Version: 1.56.0 Commit: cfa2e218100323074ac1948c885448fdf4de2a7f Date: 2021-05-04T22:06:21.189Z Electron: 12.0.4 Chrome: 89.0.4389.114 Node.js: 14.16.0 V8: 8.9.255.24-electron.0 OS: Darwin x64 20.3.0

bpruitt-goddard / vscode-mermaid-syntax-highlight

syntax highlighting after installation #50