Allow AWS URL resolution to fail during MyST build

Author: mfisher87

myst.yml

@@ -7,6 +7,10 @@ project:
   # authors: []
   license: "MIT"
   github: "https://github.com/geojupyter/workshop-open-source-geospatial"
+  error_rules:
+    - rule: "link-resolves"
+      key: "https://aws.amazon.com/"
+      severity: "warn"
   exclude:
     - "_*"
     - "README.md"
@@ -25,6 +29,7 @@ project:
       children:
         - pattern: "for-instructors/*.md"
 
+
 site:
   template: "book-theme"
   actions: