Fix PR labeling requirement (#1946)

.github/process_commit.py

@@ -30,8 +30,8 @@ SECONDARY_LABELS = {
     "module: models",
     "module: pipelines",
     "module: datasets",
-    "module: docs"
-    "module: tests"
+    "module: docs",
+    "module: tests",
     "build",
     "style",
     "perf",

.github/workflows/pr-labels.yml

@@ -31,4 +31,5 @@ jobs:
         with:
           message: |
             Hey ${{ steps.commit.outputs.merger }}!
-            You merged this PR, but no labels were added. The list of valid labels is available at https://github.com/pytorch/audio/blob/main/.github/process_commit.py
+            You merged this PR, but labels were not properly added. Please add a primary and secondary label
+            (See https://github.com/pytorch/audio/blob/main/.github/process_commit.py)