docs: improve code block highlighting in docs

Author: tobiasehlert

README.md

@@ -156,7 +156,7 @@ Next create a second terraform workspace and initiate the module, or adapt one o
 
 Note that `github_app.key_base64` needs to be a base64-encoded string of the `.pem` file i.e. the output of `base64 app.private-key.pem`. The decoded string can either be a multiline value or a single line value with new lines represented with literal `\n` characters.
 
-```terraform
+```hcl
 module "github-runner" {
   source  = "philips-labs/github-runner/aws"
   version = "REPLACE_WITH_VERSION"
@@ -244,7 +244,6 @@ module "runners" {
   ...
   kms_key_arn = aws_kms_key.github.arn
   ...
-
 ```
 
 ### Pool

docs/test-lambda-local.md

@@ -38,7 +38,8 @@ output "development" {
   value = {
     lambda_syncer = module.runners.binaries_syncer.lambda
   }
-}```
+}
+```
 
 Once you have updated your Terraform deployment you need to read the lambda configuration into your environment. Run the commands below in your Terraform workspace folder.
 
@@ -60,7 +61,7 @@ role_arn=<ARN_CHECK_TF_OUTPUT>
 
 Now you can set the profile and region as environment variables or pass as argument to SAM.
 
-```
+```bash
 export AWS_REGION=<region>
 export AWS_PROFILE=gh-development
 ```
@@ -75,7 +76,6 @@ Instead of using SAM you can use Node with `ts-node-dev` to test the code locall
 The AWS SDK does not seem to handle environment variables for profiles, the only option to pass the role is via credentials. You can get credentials via STS for the role.
 
 ```bash
-
 role=$(aws sts assume-role \
     --role-arn "<ROLE>" \
     --duration-seconds 3600 --role-session-name "dev")

examples/prebuilt/README.md

@@ -52,7 +52,6 @@ To use your image in the terraform modules you will need to set some values on t
 Assuming you have built the `linux-amzn2` image which has a pre-defined AMI name in the following format `github-runner-amzn2-x86_64-YYYYMMDDhhmm` you can use the following values.
 
 ```hcl
-
 module "runners" {
   ...
   # set the name of the ami to use

modules/download-lambda/README.md

@@ -4,7 +4,7 @@ This module is optional and provides an option to download via Terraform the Lam
 
 ## Usages
 
-```
+```hcl
 module "lambdas" {
   source = "<source location>"
   lambdas = [

modules/setup-iam-permissions/README.md

@@ -9,7 +9,7 @@ This module will create an AWS IAM role that is required to use permission bound
 See below or check out [this example](../../examples/permissions-boundary/README.md)
 Create a workspace and add the following terraform code.
 
-```
+```hcl
 module "iam" {
   source = "../../"
 
@@ -31,7 +31,6 @@ output "role" {
 output "boundary" {
   value = module.iam.boundary
 }
-
 ```
 
 Next execute the created Terraform code `terraform init && terraform apply` The module will. You can use the created role in your terraform provider with assume role and the boundary as well the namespace needs to be set to the root module.