fix: update include.html for heading error (#21906)

## Description
- Problem: Some include shortcodes produce missing H3 ToC headings (ex:
https://docker.slack.com/archives/C039ZM6GH4Z/p1737545677728649)
- Fix: Update to include.html uses Hugo readFile function to fix parsing
errors and updated all include shortcodes using Find and Replace to use
correct syntax: `{{% "include-file" %}}`

## Related issues or tickets
-
[ENGDOCS-2398](https://docker.atlassian.net/browse/ENGDOCS-2398?atlOrigin=eyJpIjoiZGE3OTBmY2ExOTliNDVjY2JlOTc4Y2ViY2MwNDI3NDEiLCJwIjoiaiJ9)

## Reviews
- [ ] Technical review

[ENGDOCS-2398]:
https://docker.atlassian.net/browse/ENGDOCS-2398?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

Author: sarahsanders-docker

content/guides/swarm-deploy.md

@@ -13,7 +13,7 @@ params:
   time: 10 minutes
 ---
 
-{{< include "swarm-mode.md" >}}
+{{% include "swarm-mode.md" %}}
 
 ## Prerequisites
 
@@ -35,7 +35,7 @@ Swarm never creates individual containers like you did in the previous step of t
 
 Now you can write a simple stack file to run and manage your Todo app, the container `getting-started` image created in [Part 2](02_our_app.md) of the tutorial. Place the following in a file called `bb-stack.yaml`:
 
-{{< include "swarm-compose-compat.md" >}}
+{{% include "swarm-compose-compat.md" %}}
 
 ```yaml
 version: "3.7"

content/manuals/admin/company/_index.md

@@ -44,7 +44,7 @@ aliases:
 
 {{< summary-bar feature_name="Company" >}}
 
-{{< include "admin-company-overview.md" >}}
+{{% include "admin-company-overview.md" %}}
 
 Learn how to administer a company in the following sections.
 

content/manuals/admin/company/new-company.md

@@ -12,7 +12,7 @@ You can create a new company in the Docker Admin Console. Before you begin, you
 - Be the owner of the organization you want to add to your company
 - Have a Docker Business subscription
 
-{{< include "admin-early-access.md" >}}
+{{% include "admin-early-access.md" %}}
 
 ## Create a company
 

content/manuals/admin/company/organizations.md

@@ -8,7 +8,7 @@ title: Manage company organizations
 
 You can manage the organizations in a company in the Docker Admin Console.
 
-{{< include "admin-early-access.md" >}}
+{{% include "admin-early-access.md" %}}
 
 ## View all organizations
 

content/manuals/admin/company/owners.md

@@ -15,7 +15,7 @@ owners for all associated organizations. Unlike organization owners, company
 owners don't need to be member of an organization. When company owners aren't a
 member in an organization, they don't occupy a seat.
 
-{{< include "admin-early-access.md" >}}
+{{% include "admin-early-access.md" %}}
 
 ## Add a company owner
 

content/manuals/admin/company/users.md

@@ -10,7 +10,7 @@ You can manage users at the company-level in the Docker Admin Console.
 
 {{% admin-users product="admin" layer="company" %}}
 
-{{< include "admin-early-access.md" >}}
+{{% include "admin-early-access.md" %}}
 
 ## Manage members on a team
 

content/manuals/admin/organization/_index.md

@@ -45,7 +45,7 @@ grid:
   icon: help
 ---
 
-{{< include "admin-org-overview.md" >}}
+{{% include "admin-org-overview.md" %}}
 
 To create an organization, see [Create your organization](../organization/orgs.md).
 

content/manuals/admin/organization/activity-logs.md

@@ -30,7 +30,7 @@ Owners can also see the activity logs for their repository if the repository is
 {{< /tab >}}
 {{< tab name="Admin Console" >}}
 
-{{< include "admin-early-access.md" >}}
+{{% include "admin-early-access.md" %}}
 
 {{% admin-org-audit-log product="admin" %}}
 

content/manuals/admin/organization/general-settings.md

@@ -5,7 +5,7 @@ description: Learn how to manage settings for organizations using Docker Admin C
 keywords: organization, settings, Admin Console
 ---
 
-{{< include "admin-early-access.md" >}}
+{{% include "admin-early-access.md" %}}
 
 This section describes how to manage organization settings in the Docker Admin Console.
 

content/manuals/admin/organization/insights.md

@@ -30,7 +30,7 @@ Key benefits include:
 
 ## View Insights for organization users
 
-{{< include "admin-early-access.md" >}}
+{{% include "admin-early-access.md" %}}
 
 To access Insights, you must contact your Customer Success Manager to have the
 feature enabled. Once the feature is enabled, access Insights using the following