Fix docs

Author: cosimomeli

README.md

@@ -578,7 +578,7 @@ No modules.
 | <a name="input_reuse_nat_ips"></a> [reuse\_nat\_ips](#input\_reuse\_nat\_ips) | Should be true if you don't want EIPs to be created for your NAT Gateways and will instead pass them in via the 'external\_nat\_ip\_ids' variable | `bool` | `false` | no |
 | <a name="input_secondary_cidr_blocks"></a> [secondary\_cidr\_blocks](#input\_secondary\_cidr\_blocks) | List of secondary CIDR blocks to associate with the VPC to extend the IP Address pool | `list(string)` | `[]` | no |
 | <a name="input_single_nat_gateway"></a> [single\_nat\_gateway](#input\_single\_nat\_gateway) | Should be true if you want to provision a single shared NAT Gateway across all of your private networks | `bool` | `false` | no |
-| <a name="input_single_nat_gateway_subnet_index"></a> [single\_nat\_gateway\_subnet\_index](#input\_single\_nat\_gateway\_subnet\_index) | The index of the public subnet which should be used for the NAT Gateway. Only used when `single_nat_gateway` is true | `number` | `0` | no |
+| <a name="input_single_nat_gateway_subnet_index"></a> [single\_nat\_gateway\_subnet\_index](#input\_single\_nat\_gateway\_subnet\_index) | The index of the public subnet used for the NAT Gateway. Only used when `single_nat_gateway` is true | `number` | `0` | no |
 | <a name="input_tags"></a> [tags](#input\_tags) | A map of tags to add to all resources | `map(string)` | `{}` | no |
 | <a name="input_use_ipam_pool"></a> [use\_ipam\_pool](#input\_use\_ipam\_pool) | Determines whether IPAM pool is used for CIDR allocation | `bool` | `false` | no |
 | <a name="input_vpc_flow_log_iam_policy_name"></a> [vpc\_flow\_log\_iam\_policy\_name](#input\_vpc\_flow\_log\_iam\_policy\_name) | Name of the IAM policy | `string` | `"vpc-flow-log-to-cloudwatch"` | no |