Update dependabot.yml (#6756)

.github/dependabot.yml

@@ -9,6 +9,9 @@ updates:
   - package-ecosystem: "gitsubmodule"
     # Look for `.gitmodules` in the `root` directory
     directory: "/"
+    ignore:
+      # Ignore updates for vcpkg (Bump to latest tag not working (no SemVer used) & macOS Intel triplet broken with newer releases)
+      - dependency-name: "vcpkg"
     # Check for updates once a month
     schedule:
       interval: "monthly"