Add documentation for the --ignore option (#2694)

Author: strmer15

website/src/pages/docs/commands/validate.mdx

@@ -48,6 +48,7 @@ graphql-inspector validate DOCUMENTS SCHEMA
 - `--complexityDepthCostFactor <n>` - Depth cost factor config to use with maxComplexityScore
   (default: `1.5`)
 - `--filter <s>` - show warnings and errors only for a file (or a list of files)
+- `--ignore <s>` - ignore and do not load these files (supports glob)
 - `--silent` - silent mode
 - `--output <s>` - writes errors to a file
 - `--onlyErrors` - shows only errors