fix: add heading attribute to data model sections

Author: xaviaracil

ob_v3p0/microsites/v3p0.md

@@ -1011,6 +1011,7 @@ This standard references four VC Extensions:
 modelId: org.1edtech.ob.v3p0.model
 package: SharedCredentialDataModels
 title: Credential Data Models
+heading: 3
 ```
 
 The data models in this section are shared by [[OB-30]] and [[CLR-20]].
@@ -1019,6 +1020,7 @@ The data models in this section are shared by [[OB-30]] and [[CLR-20]].
 modelId: org.1edtech.ob.v3p0.model
 package: ApiDataModels
 title: Open Badges API Data Models
+heading: 3
 ```
 
 The data models in this section are used by the [[[#open-badges-api]]].
@@ -1027,6 +1029,7 @@ The data models in this section are used by the [[[#open-badges-api]]].
 modelId: org.1edtech.ob.v3p0.model
 package: SharedApiDataModels
 title: Shared API Data Models
+heading: 3
 ```
 
 The data models in this section are shared by all 1EdTech service specifications.
@@ -1035,6 +1038,7 @@ The data models in this section are shared by all 1EdTech service specifications
 modelId: org.1edtech.ob.v3p0.model
 package: SharedApiSecurityDataModels
 title: Shared API Security Data Models
+heading: 3
 ```
 
 The data models in this section are shared by all 1EdTech service specifications.
@@ -1043,6 +1047,7 @@ The data models in this section are shared by all 1EdTech service specifications
 modelId: org.1edtech.ob.v3p0.model
 package: SharedOAuthDataModels
 title: Shared OAuth 2.0 Data Models
+heading: 3
 ```
 
 The data models in this section are shared by all 1EdTech service specifications.
@@ -1051,6 +1056,7 @@ The data models in this section are shared by all 1EdTech service specifications
 modelId: org.1edtech.ob.v3p0.model
 package: SharedProofDataModels
 title: Shared Proof Data Models
+heading: 3
 ```
 
 Data models for the JSON Web Token Proof Format (VC-JWT) [[VC-DATA-MODEL-2.0]] shared by [[OB-30]] and [[CLR-20]].
@@ -1059,6 +1065,7 @@ Data models for the JSON Web Token Proof Format (VC-JWT) [[VC-DATA-MODEL-2.0]] s
 modelId: org.1edtech.ob.v3p0.model
 stereotype: DerivedType
 title: Derived Types
+heading: 3
 ```
 
 The derived types in this section are shared by all 1EdTech specifications.
@@ -1068,6 +1075,7 @@ The derived types in this section are shared by all 1EdTech specifications.
 modelId: org.1edtech.ob.v3p0.model
 stereotype: PrimitiveType
 title: Primitive Types
+heading: 3
 ```
 
 The primitive types in this section are shared by all 1EdTech specifications.
@@ -1076,6 +1084,7 @@ The primitive types in this section are shared by all 1EdTech specifications.
 modelId: org.1edtech.ob.v3p0.model
 package: SharedLegacyCredentialsDataModels
 title: Verification Support Data Models
+heading: 3
 ```
 
 The data models in this section are used by the [[[#verification-and-validation]]] process for supporting older credentials created with [[VC-DATA-MODEL-1.1]].