If you've ever needed this:
// The following certificate is for use with github.com:443
// It is valid between 2024-03-06 7:00:00 PM (UTC) and 2025-03-07 6:59:59 PM (UTC) inclusive.
const char* GITHUB_COM_CERTIFICATE = "-----BEGIN CERTIFICATE-----\n" \
"MIIEozCCBEmgAwIBAgIQTij3hrZsGjuULNLEDrdCpTAKBggqhkjOPQQDAjCBjzEL\n" \
"MAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UE\n" \
"BxMHU2FsZm9yZDEYMBYGA1UEChMPU2VjdGlnbyBMaW1pdGVkMTcwNQYDVQQDEy5T\n" \
"ZWN0aWdvIEVDQyBEb21haW4gVmFsaWRhdGlvbiBTZWN1cmUgU2VydmVyIENBMB4X\n" \
"DTI0MDMwNzAwMDAwMFoXDTI1MDMwNzIzNTk1OVowFTETMBEGA1UEAxMKZ2l0aHVi\n" \
"LmNvbTBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABARO/Ho9XdkY1qh9mAgjOUkW\n" \
"mXTb05jgRulKciMVBuKB3ZHexvCdyoiCRHEMBfFXoZhWkQVMogNLo/lW215X3pGj\n" \
"ggL+MIIC+jAfBgNVHSMEGDAWgBT2hQo7EYbhBH0Oqgss0u7MZHt7rjAdBgNVHQ4E\n" \
"FgQUO2g/NDr1RzTK76ZOPZq9Xm56zJ8wDgYDVR0PAQH/BAQDAgeAMAwGA1UdEwEB\n" \
"/wQCMAAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMEkGA1UdIARCMEAw\n" \
"NAYLKwYBBAGyMQECAgcwJTAjBggrBgEFBQcCARYXaHR0cHM6Ly9zZWN0aWdvLmNv\n" \
"bS9DUFMwCAYGZ4EMAQIBMIGEBggrBgEFBQcBAQR4MHYwTwYIKwYBBQUHMAKGQ2h0\n" \
"dHA6Ly9jcnQuc2VjdGlnby5jb20vU2VjdGlnb0VDQ0RvbWFpblZhbGlkYXRpb25T\n" \
"ZWN1cmVTZXJ2ZXJDQS5jcnQwIwYIKwYBBQUHMAGGF2h0dHA6Ly9vY3NwLnNlY3Rp\n" \
"Z28uY29tMIIBgAYKKwYBBAHWeQIEAgSCAXAEggFsAWoAdwDPEVbu1S58r/OHW9lp\n" \
"LpvpGnFnSrAX7KwB0lt3zsw7CAAAAY4WOvAZAAAEAwBIMEYCIQD7oNz/2oO8VGaW\n" \
"WrqrsBQBzQH0hRhMLm11oeMpg1fNawIhAKWc0q7Z+mxDVYV/6ov7f/i0H/aAcHSC\n" \
"Ii/QJcECraOpAHYAouMK5EXvva2bfjjtR2d3U9eCW4SU1yteGyzEuVCkR+cAAAGO\n" \
"Fjrv+AAABAMARzBFAiEAyupEIVAMk0c8BVVpF0QbisfoEwy5xJQKQOe8EvMU4W8C\n" \
"IGAIIuzjxBFlHpkqcsa7UZy24y/B6xZnktUw/Ne5q5hCAHcATnWjJ1yaEMM4W2zU\n" \
"3z9S6x3w4I4bjWnAsfpksWKaOd8AAAGOFjrv9wAABAMASDBGAiEA+8OvQzpgRf31\n" \
"uLBsCE8ktCUfvsiRT7zWSqeXliA09TUCIQDcB7Xn97aEDMBKXIbdm5KZ9GjvRyoF\n" \
"9skD5/4GneoMWzAlBgNVHREEHjAcggpnaXRodWIuY29tgg53d3cuZ2l0aHViLmNv\n" \
"bTAKBggqhkjOPQQDAgNIADBFAiEAru2McPr0eNwcWNuDEY0a/rGzXRfRrm+6XfZe\n" \
"SzhYZewCIBq4TUEBCgapv7xvAtRKdVdi/b4m36Uyej1ggyJsiesA\n" \
"-----END CERTIFICATE-----";
The now you can get it from the Windows command line as easily as this:
certifiable github.com -c
I just wrote it over the last few days and this is the first release hot off the press - it supports generating code in C++ (for ESP32 / Arduino), Python, and VB.net
Here is open source project where you can get a downloadable signed portable executable file:
https://github.com/roblatour/certifiable/blob/main/README.md
Hope it will be of good use to you.