Update DOCtor-RST to version 1.71

Update DOCtor-RST from version 1.70.2 to 1.71 and enable the new
use_double_backticks_for_inline_literals rule to ensure proper
inline literal markup in RST documentation.

Author: OskarStark

.doctor-rst.yaml

@@ -67,6 +67,7 @@ rules:
     typo: ~
     unused_links: ~
     use_deprecated_directive_instead_of_versionadded: ~
+    use_double_backticks_for_inline_literals: ~
     use_named_constructor_without_new_keyword_rule: ~
     use_https_xsd_urls: ~
     valid_inline_highlighted_namespaces: ~

.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:1.70.2
+                uses: docker://oskarstark/doctor-rst:1.71
                 with:
                     args: --short --error-format=github --cache-file=/github/workspace/.cache/doctor-rst.cache