Update README.md

Signed-off-by: Jan Kowalleck <[email protected]>

Author: jkowalleck

README.md

@@ -120,12 +120,12 @@ pnpm add github:CycloneDX/cyclonedx-javascript-library
 yarn add @cyclonedx/cyclonedx-library@github:CycloneDX/cyclonedx-javascript-library # only with yarn-2
 ```
 
-## Optional Dependencies
+## Optional Peer Dependencies
 
-Some dependencies are optional.
+Some peer dependencies are optional.
 See the shipped `package.json` for version constraints.
 
-* Serialization to XML on _Node.js_ requires any of:
+* Serialization to XML on _Node.js_ requires all of:
   * [`xmlbuilder2`](https://www.npmjs.com/package/xmlbuilder2)
 * Validation of JSON on _Node.js_ requires all of:
   * [`ajv`](https://www.npmjs.com/package/ajv)