fix variable

Author: h-vetinari

.github/workflows/migrator_uniqueness.yml

@@ -43,7 +43,7 @@ jobs:
             echo "Checking for existing uses of migrator $migrator in conda-forge..."
 
             # Search in GH-org with exact path where migrators end up
-            query=$(printf "org:conda-forge path:.ci_support/migrations/$filename" | jq -sRr @uri)
+            query=$(printf "org:conda-forge path:.ci_support/migrations/$migrator" | jq -sRr @uri)
             response=$(curl -s -H "Accept: application/vnd.github+json" \
                              -H "Authorization: token $GH_TOKEN" \
                              "https://api.github.com/search/code?q=$query&per_page=10")