ci(lint): allow clippy::doc-markdown

.github/workflows/lint.yaml

@@ -69,7 +69,11 @@ jobs:
             - name: Install components
               run: rustup component add clippy rustfmt
 
-            - run: cargo clippy ${{ matrix.feature.flags }} -- -D warnings -D clippy::pedantic
+            - run: |
+                cargo clippy ${{ matrix.feature.flags }} -- \
+                  -D warnings \
+                  -D clippy::pedantic \
+                  -A clippy::doc-markdown
 
             - if: always()
               run: cargo fmt --check