Validate links (#42)

Author: dfed

.github/workflows/ci.yml

@@ -94,3 +94,11 @@ jobs:
         uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
+  readme-validation:
+    name: Check Markdown links
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v4
+      - name: Validate Markdown
+        uses: gaurav-nelson/github-action-markdown-link-check@v1

Contributing.md

@@ -4,7 +4,7 @@ Keep your Pull Requests small. Small PRs are easier to reason about which makes
 
 ### Issues before features
 
-If you want to add a feature, please file an [Issue](../../issues) first. An Issue gives us the opportunity to discuss the requirements and implications of a feature with you before you start writing code.
+If you want to add a feature, please file an [Issue](https://github.com/dfed/swift-async-queue/issues) first. An Issue gives us the opportunity to discuss the requirements and implications of a feature with you before you start writing code.
 
 ### Backwards compatibility