fix: s3 bucket deprecated arguments

[blimmer]

This PR resolves the following deprecations for arguments to s3 buckets:

│ Warning: Argument is deprecated
│
│   with module.travel_blog.module.cloudfront.aws_s3_bucket.wordpress_bucket,
│   on .terraform/modules/travel_blog/modules/cloudfront/distribution.tf line 4, in resource "aws_s3_bucket" "wordpress_bucket":
│    4: resource "aws_s3_bucket" "wordpress_bucket" {
│
│ Use the aws_s3_bucket_server_side_encryption_configuration resource instead
│
│ (and 5 more similar warnings elsewhere)

│ Warning: Argument is deprecated
│
│   with module.travel_blog.module.codebuild.aws_s3_bucket.code_source,
│   on .terraform/modules/travel_blog/modules/codebuild/main.tf line 8, in resource "aws_s3_bucket" "code_source":
│    8:   acl           = "private"
│
│ Use the aws_s3_bucket_acl resource instead
│
│ (and one more similar warning elsewhere)

[blimmer]

Ah, I see this is done in #55 .