ci: fix Dependabot config (#624)

newpavlov · web-flow · commit 3b1605888f86 · 2025-03-07T14:59:07.000+03:00
It looks like Cargo does not support the `increase-if-necessary`
versioning strategy.
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
@@ -2,7 +2,7 @@ version: 2
 updates:
 - package-ecosystem: cargo
   directory: "/"
-  versioning-strategy: increase-if-necessary
+  versioning-strategy: lockfile-only
   allow:
     - dependency-type: "all"
   schedule:
