Update dependabot.yml to add julia support

Signed-off-by: abhro <5664668+abhro@users.noreply.github.com>

Author: abhro

.github/dependabot.yml

@@ -3,5 +3,13 @@ version: 2
 updates:
   - package-ecosystem: "github-actions"
     directory: "/" # Location of package manifests
+    schedule:
+      interval: "quarterly"
+  - package-ecosystem: "julia"
+    directories: ["/",  "/docs", "/test"]
     schedule:
       interval: "monthly"
+    groups:
+      all-julia-packages:
+        patterns:
+          - "*"