moving pandoc to steps

.gitea/workflows/convert-html-docs.yaml

@@ -112,6 +112,19 @@ jobs:
         with:
           python-version: 3.10
 
+      - name: Download Pandoc 2.19.2
+        run: |
+          curl -L -o pandoc.tar.gz \
+            https://github.com/jgm/pandoc/releases/download/2.19.2/pandoc-2.19.2-linux-amd64.tar.gz
+
+      - name: Extract and Install Pandoc
+        run: |
+          tar xvzf pandoc.tar.gz --strip-components 1 -C /usr/local/
+          chmod +x /usr/local/bin/pandoc
+
+      - name: Verify Installation
+        run: pandoc --version
+
       # - name: Restore venv from cache
       #   uses: actions/cache@v3
       #   with: