Fix GitHub IP Ranges Returning IPv6

The GitHub provider is returning IPv6 IPs in addition to IPv4
IPs for the hooks. This is not compatible with AWS security
rules which require IPv4 and IPv6 IPs to be seperate.

This is a [fixed bug](integrations/terraform-provider-github#883)
in 4.14 version of the provider.

terraform/projects/infra-security-groups/README.md

@@ -9,15 +9,15 @@ Manage the security groups for the entire infrastructure
 | <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | = 0.11.15 |
 | <a name="requirement_aws"></a> [aws](#requirement\_aws) | 2.46.0 |
 | <a name="requirement_fastly"></a> [fastly](#requirement\_fastly) | ~> 0.26.0 |
-| <a name="requirement_github"></a> [github](#requirement\_github) | ~> 4.9.0 |
+| <a name="requirement_github"></a> [github](#requirement\_github) | ~> 4.14.0 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
 | <a name="provider_aws"></a> [aws](#provider\_aws) | 2.46.0 |
 | <a name="provider_fastly"></a> [fastly](#provider\_fastly) | ~> 0.26.0 |
-| <a name="provider_github"></a> [github](#provider\_github) | ~> 4.9.0 |
+| <a name="provider_github"></a> [github](#provider\_github) | ~> 4.14.0 |
 | <a name="provider_terraform"></a> [terraform](#provider\_terraform) | n/a |
 
 ## Modules

terraform/projects/infra-security-groups/ci-master.tf

@@ -92,7 +92,7 @@ resource "aws_security_group_rule" "ci-master-elb_ingress_github_https" {
   protocol  = "tcp"
 
   security_group_id = "${aws_security_group.ci-master_elb.id}"
-  cidr_blocks       = ["${data.github_ip_ranges.github.hooks}"]
+  cidr_blocks       = ["${data.github_ip_ranges.github.hooks_ipv4}"]
 }
 
 resource "aws_security_group_rule" "ci-master-elb_egress_any_any" {

terraform/projects/infra-security-groups/main.tf

@@ -30,7 +30,7 @@ provider "fastly" {
 }
 
 provider "github" {
-  version = "4.9.0"
+  version = "~> 4.14.0"
 }
 
 data "fastly_ip_ranges" "fastly" {}