Use correct Droplet size slug

Taken from https://developers.digitalocean.com/documentation/v2/#list-all-sizes

1 files changed, 1 insertions, 1 deletions

diff --git a/vps.tf b/vps.tf
index 8598250..c5412c3 100644
--- a/vps.tf
+++ b/vps.tf
@@ -10,7 +10,7 @@ resource "digitalocean_droplet" "vps" {
   image      = "ubuntu-18-04-x64"
   name       = "sovereignty"
   region     = "nyc3"
-  size       = "1024mb"
+  size       = "s-1vcpu-1gb"
   backups    = true
   ipv6       = true
   monitoring = true