reorder unit test workflow step

Author: yiyuan-he

.github/workflows/release-udp-exporter.yml

@@ -31,11 +31,6 @@ jobs:
         working-directory: exporters/aws-otel-otlp-udp-exporter
         run: hatch build
 
-      # TODO: Add unit tests step
-      - name: Ensure Unit Tests are passing
-        run: |
-          pytest exporters/aws-otel-otlp-udp-exporter/tests/test_exporter.py
-
       - name: Download and run X-Ray Daemon
         run: |
           mkdir xray-daemon
@@ -48,6 +43,10 @@ jobs:
         run: |
           pip install ./exporters/aws-otel-otlp-udp-exporter/dist/*.whl
 
+      - name: Ensure Unit Tests are passing
+        run: |
+          pytest exporters/aws-otel-otlp-udp-exporter/tests/test_exporter.py
+
       - name: Run Sample App in Background
         working-directory: sample-applications/integ-test-app
         run: |