website: Wrap problematic code-blocks in `{{% raw %}}`

Code blocks containing double curley brackets, such as:

```
{{ user `boot_command_prefix` }}
```

, confuses the Jekyll markdown renderer. To fix this code-blocks
containing curly brackets need wrapped in `{{% raw %}}/{$ endraw %}}`.
For example:

{% raw %}
```
{{ user `boot_command_prefix` }}
```
{% endraw %}

Change-Id: Ia487f8cef8fcb09381cedd9e446a67425b00f3ca
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/55164
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: Bobby Bruce <bbruce@ucdavis.edu>
diff --git a/_pages/documentation/gem5art/main/main_5_disks.md b/_pages/documentation/gem5art/main/main_5_disks.md
index a25a83d..3378ba5 100644
--- a/_pages/documentation/gem5art/main/main_5_disks.md
+++ b/_pages/documentation/gem5art/main/main_5_disks.md
@@ -115,6 +115,8 @@
 In `[disk-name].json`, we could add more scripts to `provisioners`.
 Note that the files are on the host, but the effects are on the disk image.
 For example, the following example runs `shared/post_installation.sh` after Ubuntu is installed,
+
+{% raw %}
 ```shell
 {
     "type": "shell",
@@ -125,6 +127,8 @@
     ]
 }
 ```
+{% endraw %}
+
 <a name="buildsimple"></a>
 ### d. Building the Disk Image
 <a name="simplebuild"></a>
diff --git a/_pages/documentation/gem5art/tutorials/tutorial_2_npb.md b/_pages/documentation/gem5art/tutorials/tutorial_2_npb.md
index 6abf4d7..89680bf 100644
--- a/_pages/documentation/gem5art/tutorials/tutorial_2_npb.md
+++ b/_pages/documentation/gem5art/tutorials/tutorial_2_npb.md
@@ -216,6 +216,7 @@
 
 Finally, create **npb.json** and add following contents:
 
+{% raw %}
 ```json
 {
     "builders":
@@ -322,6 +323,7 @@
 
 }
 ```
+{% endraw %}
 
 **npb.json** is our primary .json configuration file. The provisioners and variables section of this file configure the files that need to be transferred to the disk and other things like disk image's name.
 
diff --git a/_pages/documentation/gem5art/tutorials/tutorial_3_parsec.md b/_pages/documentation/gem5art/tutorials/tutorial_3_parsec.md
index 4c1b854..9027014 100644
--- a/_pages/documentation/gem5art/tutorials/tutorial_3_parsec.md
+++ b/_pages/documentation/gem5art/tutorials/tutorial_3_parsec.md
@@ -211,6 +211,7 @@
 
 Finally, create parsec.json and add following contents:
 
+{% raw %}
 ```json
 {
     "builders":
@@ -317,6 +318,7 @@
 
 }
 ```
+{% endraw %}
 
 parsec.json is our primary .json configuration file. The provisioners and variables section of this file configure the files that need to be transferred to the disk and other things like disk image's name.