fix: correct dependabot ignore block indentation (#7)

The ignore stanza for the terraform package-ecosystem was incorrectly
nested under the schedule/patterns key. This moves it to the correct
scope as a direct property of the package-ecosystem entry, so that
dependabot properly applies the semver-major ignore rules.

Author: ben-vaughan-nttd

.github/dependabot.yml

@@ -23,10 +23,10 @@ updates:
     directory: "/"
     multi-ecosystem-group: "module"
     patterns: ["*"]
-      ignore:
-        - dependency-name: "hashicorp/*"
-          update-types: ["version-update:semver-major"]
-        - dependency-name: "microsoft/*"
-          update-types: ["version-update:semver-major"]
-        - dependency-name: "azure/*"
-          update-types: ["version-update:semver-major"]
+    ignore:
+      - dependency-name: "hashicorp/*"
+        update-types: ["version-update:semver-major"]
+      - dependency-name: "microsoft/*"
+        update-types: ["version-update:semver-major"]
+      - dependency-name: "azure/*"
+        update-types: ["version-update:semver-major"]