Release Notes for v21.2.1

Fixes

• Default margin has been added in the code. #36072 (Also in 22)
• Fixed a potential issue when calling webContents.printToPDF(). #36064 (Also in 22)
• Fixed spurious promise rejection in webContents.loadURL when navigating to a hash. #36150

Other Changes

• Updated Chromium to 106.0.5249.165. #36162