Cache website results for 1 week (#277)

Author: enocom

.github/workflows/ci.yml

@@ -11,11 +11,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
+    - name: Restore lychee cache
+      uses: actions/cache@v4
+      with:
+        path: .lycheecache
+        key: cache-lychee-${{ github.sha }}
+        restore-keys: cache-lychee-
     - name: Link Checker
       id: lychee
       uses: lycheeverse/lychee-action@v2
       with:
-        args: "--exclude https://www.uber.com README.md" # Uber returns 406s otherwise
+        args: "--base . --cache --max-cache-age 1w . --exclude https://www.uber.com README.md" # Uber returns 406s otherwise
     - name: "Check for exactly 200 links"
       run: |
         grep "\- \[" README.md | grep -Eo "https?://[^][ ]+" | sed 's/)//' | sort > links-only.txt