Merge pull request #64 from developmentseed/fix/add-dependabot-github-actions

ci: add Dependabot for GitHub Actions version updates

Author: vincentsarago

.github/dependabot.yml

@@ -13,3 +13,19 @@ updates:
       titiler:
         patterns:
           - titiler*
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    cooldown:
+      default-days: 7
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    groups:
+      minor-and-patch:
+        applies-to: version-updates
+        patterns:
+          - "*"
+        update-types:
+          - "minor"
+          - "patch"