Rename default branch from "master" to "main"

[bobwatso-aws]

Rename the default branch to the more inclusive branch name, "main"

[Halilhmrh]

{
"🅥🅔🅡🅢🅘🅞🅝": 3,
"🅣🅗🅘🅝🅖🅝🅐🅜🅔": "🅜🅨🅛🅘🅖🅗🅣🅑🅤🅛🅑",
"🅓🅔🅕🅐🅤🅛🅣🅒🅛🅘🅔🅝🅣🅘🅓": "🅜🅨🅛🅘🅖🅗🅣🅑🅤🅛🅑",
"🅣🅗🅘🅝🅖🅣🅨🅟🅔🅝🅐🅜🅔": "🅛🅘🅖🅗🅣🅑🅤🅛🅑",
"🅐🅣🅣🅡🅘🅑🅤🅣🅔🅢": {
"🅜🅞🅓🅔🅛": "123",
"🅦🅐🅣🅣🅐🅖🅔": "75"
}
}

[joshbean]

Closing this issue or pull request in advance of archiving this repo. For more information about the decision to archive this repo (and others in the 'awsdocs' org), see the announcement on the AWS News Blog.