Allow and document new options introduced in jekyll-sass-converter 3.1.0 (SchemaStore#4686)

* Add sass.silence_deprecations configuration option

* Add sass.fatal_deprecations & sass.future_deprecations configuration options

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: Philzen

src/schemas/json/jekyll.json

@@ -927,6 +927,36 @@
           },
           "default": []
         },
+        "fatal_deprecations": {
+          "description": "An array of deprecations or versions to treat as fatal.\nhttps://github.com/jekyll/jekyll-sass-converter#configuration-options",
+          "type": "array",
+          "uniqueItems": true,
+          "items": {
+            "type": "string",
+            "minLength": 1
+          },
+          "default": []
+        },
+        "future_deprecations": {
+          "description": "An array of active deprecations to ignore.\nhttps://github.com/jekyll/jekyll-sass-converter#configuration-options",
+          "type": "array",
+          "uniqueItems": true,
+          "items": {
+            "type": "string",
+            "minLength": 1
+          },
+          "default": []
+        },
+        "silence_deprecations": {
+          "description": "An array of future deprecations to opt into early.\nhttps://github.com/jekyll/jekyll-sass-converter#configuration-options",
+          "type": "array",
+          "uniqueItems": true,
+          "items": {
+            "type": "string",
+            "minLength": 1
+          },
+          "default": []
+        },
         "sourcemap": {
           "description": "Control when source maps shall be generated\nhttps://github.com/jekyll/jekyll-sass-converter#configuration-options",
           "type": "string",