minor #20718 Use DOCtor-RST 1.67.0 (OskarStark)

This PR was squashed before being merged into the 6.4 branch.

Discussion
----------

Use DOCtor-RST 1.67.0

Follows
* #20717
* OskarStark/doctor-rst#1949

Commits
-------

2712ab1 Use DOCtor-RST 1.67.0

Author: OskarStark

.doctor-rst.yaml

@@ -41,6 +41,7 @@ rules:
     no_composer_req: ~
     no_directive_after_shorthand: ~
     no_duplicate_use_statements: ~
+    no_empty_literals: ~
     no_explicit_use_of_code_block_php: ~
     no_footnotes: ~
     no_inheritdoc: ~
@@ -118,3 +119,4 @@ whitelist:
         - '.. _`a feature to test applications using Mercure`: https://github.com/symfony/panther#creating-isolated-browsers-to-test-apps-using-mercure-or-websocket'
         - 'End to End Tests (E2E)'
         - '.. versionadded:: 2.2.0' # Panther
+        - '* Inline code blocks use double-ticks (````like this````).'

.github/workflows/ci.yaml

@@ -72,7 +72,7 @@ jobs:
                     key: ${{ runner.os }}-doctor-rst-${{ steps.extract_base_branch.outputs.branch }}
 
             -   name: "Run DOCtor-RST"
-                uses: docker://oskarstark/doctor-rst:1.66.0
+                uses: docker://oskarstark/doctor-rst:1.67.0
                 with:
                     args: --short --error-format=github --cache-file=/github/workspace/.cache/doctor-rst.cache