Fix spelling of "front matter"

CONTRIBUTING.md

@@ -100,7 +100,7 @@ Docusaurus provides many options for laying out documentation pages and their me
 
 - File names and therefore generated URLs should all be `kebab-case`.
 
-- Let Docusaurus automatically generate the page's title from its top level markdown heading instead of using `title` in the frontmatter. This is different from the sidebar label or URL slug.
+- Let Docusaurus automatically generate the page's title from its top level markdown heading instead of using `title` in the front matter. This is different from the sidebar label or URL slug.
 
 - Use relative file paths for all links between pages.
   - This keeps page links pointing to the current version of the documentation.
@@ -129,7 +129,7 @@ Docusaurus provides many options for laying out documentation pages and their me
           Object Store Bucket Layout
   ```
 
-  - Sidebar labels are automatically generated from page titles. To use a different sidebar label, use the `sidebar_label` property in the page's frontmatter.
+  - Sidebar labels are automatically generated from page titles. To use a different sidebar label, use the `sidebar_label` property in the page's front matter.
 
 - Don't rely on Ozone specific acronyms in the sidebar. This makes docs navigation more beginner friendly.
   - For example, the pages on bucket layouts may be organized as:
@@ -178,7 +178,7 @@ The file names and content of all markdown pages are checked for spelling mistak
 
 - Option 1: If the word is relevant for the whole Ozone project, add it to the `words` list in *cspell.yaml* so that it is considered valid.
 
-- Option 2: If the word is only relevant for one specific page, add an [inline directive](https://cspell.org/configuration/document-settings/) as a comment in the markdown frontmatter of that page only.
+- Option 2: If the word is only relevant for one specific page, add an [inline directive](https://cspell.org/configuration/document-settings/) as a comment in the markdown front matter of that page only.
 
 ### Updating Graphics
 

cspell.yaml

@@ -78,7 +78,6 @@ words:
 - gpg
 - sed
 - mds
-- frontmatter
 - javadoc
 # Misc words
 - acking

docusaurus.config.js

@@ -39,12 +39,12 @@ const config = {
   markdown: {
     // Validate markdown frontmatter against a more restrictive schema than what Docusaurus allows.
     // This ensures all pages are using a minimal set of consistent keys.
-    // It can also be used to require all pages to define certain markdown frontmatter keys.
+    // It can also be used to require all pages to define certain markdown front matter keys.
     parseFrontMatter: async (params) => {
       // Reuse the default parser.
       const result = await params.defaultParseFrontMatter(params);
 
-      // Validate frontmatter against the schema.
+      // Validate front matter against the schema.
       const schemaPath = './.github/resource/frontmatter.schema.json';
       const frontMatterSchema = require(schemaPath);
       const ajv = new Ajv();