ISO edit: Sentence casing + No para wihtout heading

Signed-off-by: Arthit Suriyawongkul <arthit@gmail.com>

Author: bact

CHANGELOG.md

@@ -1,4 +1,4 @@
-# Change Log
+# Change log
 
 All notable changes to this project will be documented in this file.
 

docs/conformance.md

@@ -110,7 +110,7 @@ License Expression syntax and that relate to the
 [SPDX License List](https://spdx.org/licenses/).
 
 There are two associated profiles, the SimpleLicensing profile
-and the ExpandedLicensing profiles.
+and the ExpandedLicensing profile.
 Both allow expression of the same information,
 albeit in different ways.
 

docs/front/copyright.md

@@ -1,4 +1,4 @@
-# Use of Specification - Terms, Conditions & Notices
+# Use of specification - terms, conditions & notices
 
 Copyright © 2010–2025, The Linux Foundation and its Contributors,
 including SPDX Model contributions from OMG and its Contributors.

docs/references.md

@@ -1,6 +1,6 @@
 # References
 
-## Normative References
+## Normative references
 
 The following documents are referred to in the text in such a way that some or
 all of their content constitutes requirements of this document. For dated
@@ -172,7 +172,7 @@ Forum of Incident Response and Security Teams, Inc (FIRST),
 CISA,
 [https://www.cisa.gov/sites/default/files/2023-04/sbom-types-document-508c.pdf](https://www.cisa.gov/sites/default/files/2023-04/sbom-types-document-508c.pdf).
 
-## Non-normative References
+## Non-normative references
 
 The following documents are referred to in the text.
 

docs/serializations.md

@@ -92,6 +92,8 @@ element.
 
 ## Serialization in SPDX 3 JSON
 
+### A strict subset of JSON-LD
+
 The SPDX 3 JSON format is a strict subset of JSON-LD.
 It requires data to be serialized according to the defined serialization
 specification and validated against the SPDX 3 JSON Schema.