Disable auto-rebase on dependabot PR

Author: cmaglie

.github/dependabot.yml

@@ -13,6 +13,7 @@ updates:
       - "topic: infrastructure"
     commit-message:
       prefix: "[skip changelog] "
+    rebase-strategy: disabled
   - package-ecosystem: gomod
     directory: /
     schedule:
@@ -22,3 +23,4 @@ updates:
       - "topic: infrastructure"
     commit-message:
       prefix: "[skip changelog] "
+    rebase-strategy: disabled