docs: improve default values

Author: ldez

.golangci.next.reference.yml

@@ -60,15 +60,15 @@ run:
 # output configuration options
 output:
   # The formats used to render issues.
-  # Format: colored-line-number|line-number|json|colored-tab|tab|checkstyle|code-climate|junit-xml|github-actions|teamcity
+  # Format: `colored-line-number`, `line-number`, `json`, `colored-tab`, `tab`, `checkstyle`, `code-climate`, `junit-xml`, `github-actions`, `teamcity`
   # Output path can be either `stdout`, `stderr` or path to the file to write to.
   #
   # For the CLI flag (`--out-format`), multiple formats can be specified by separating them by comma.
   # The output can be specified for each of them by separating format name and path by colon symbol.
   # Example: "--out-format=checkstyle:report.xml,json:stdout,colored-line-number"
   # The CLI flag (`--out-format`) override the configuration file.
   #
-  # Default: colored-line-number
+  # Default: `format: colored-line-number` and `path: stdout`
   formats:
     - format: json
       path: stderr

jsonschema/golangci.next.jsonschema.json

@@ -456,6 +456,7 @@
             "additionalProperties": false,
             "properties": {
               "path": {
+                "default": "stdout",
                 "anyOf": [
                   {
                     "enum": [ "stdout", "stderr" ]