Updates name filter for centos7 to match upstream images

[lorengordon]

Minor tweak so the centos7 filter will match upstream images...

❯ aws ec2 describe-images --owner 125523088429 --filters 'Name=name,Values=CentOS 7.* x86_64'
{
    "Images": []
}

vs

❯ aws ec2 describe-images --owner 125523088429 --filters 'Name=name,Values=CentOS Linux 7 x86_64 *'
{
    "Images": [
        {
            "Architecture": "x86_64",
            "CreationDate": "2022-11-14T07:26:05.000Z",
            "ImageId": "ami-0aedf6b1cb669b4c7",
            "ImageLocation": "125523088429/CentOS Linux 7 x86_64 - 2211",
            "ImageType": "machine",
            "Public": true,
            "OwnerId": "125523088429",
...

Also went ahead and updated the associated url, since the prior wiki link is dead.

[lorengordon]

go codebuild go