chore(deps): update pandoc/core docker digest to 31344f7

[skip pre-commit.ci]

Author: renovate[bot]

.github/workflows/gh-pages.yml

@@ -51,7 +51,7 @@ jobs:
         run: asciidoctor -b docbook README.adoc
 
       - name: Generate README.md from README.xml using pandoc
-        uses: docker://pandoc/core@sha256:2b79262284929afdbe98b73097bfc6ed0e1fb5b0ea59db984890e6b84d5fe17a
+        uses: docker://pandoc/core@sha256:31344f72386c1731ab4ba37b1f86f244b8d845de39b6cc10a7e67d2db58fcb41
         with:
           args: "-f docbook -t markdown_strict README.xml -o README.md --wrap=none"