Fix arm64 hll debsigner build context

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
(cherry picked from commit f81884b)

Author: ihalatci-msft

.github/workflows/build-package.yml

@@ -78,7 +78,7 @@ jobs:
 
       - name: Build arm64 debsigner image
         if: matrix.arch == 'arm64'
-        run: docker build -t citusdata/packaging:debsigner -f tooling/dockerfiles/debsigner/Dockerfile tooling
+        run: docker build -t citusdata/packaging:debsigner tooling/dockerfiles/debsigner
 
       - name: Build packages
         run: |