Update landscape data url

We'll use Cynthia's fork until cncf/landscape#3418 is merged.

Signed-off-by: Sergio Castaño Arteaga <tegioz@icloud.com>

.github/workflows/cncf.yml

@@ -39,7 +39,7 @@ jobs:
         run: |
           landscape2 build \
             --settings-file ./cncf/settings.yml \
-            --data-file ./landscape/landscape.yml \
+            --data-url https://raw.githubusercontent.com/cynthia-sg/landscape/cynthia-sg/security-audit-dates/landscape.yml \
             --logos-path ./landscape/hosted_logos \
             --cache-dir /tmp/landscape-cache \
             --output-dir /tmp/landscape