Update dependabot.yaml

Signed-off-by: Ryan Baxter <ryan.baxter@broadcom.com>

Author: ryanjbaxter

.github/dependabot.yaml

@@ -40,24 +40,15 @@ updates:
   - package-ecosystem: npm
     target-branch: docs-build
     directory: /
-    ignore:
-      # antora 3.2.0-alpha.12 is not compatible with the version of node we use so do not update it
-      - dependency-name: "antora"
     schedule:
       interval: weekly
   - package-ecosystem: npm
     target-branch: main
     directory: /docs
-    ignore:
-      # antora 3.2.0-alpha.12 is not compatible with the version of node we use so do not update it
-      - dependency-name: "antora"
     schedule:
       interval: weekly
   - package-ecosystem: npm
     target-branch: 4.3.x
     directory: /docs
-    ignore:
-      # antora 3.2.0-alpha.12 is not compatible with the version of node we use so do not update it
-      - dependency-name: "antora"
     schedule:
       interval: weekly