Update PR labels (#2912)

Summary:
replace "example" primary label with "tutorial" and "recipe"

cc pytorch/team-audio-core

Pull Request resolved: https://github.com/pytorch/audio/pull/2912

Reviewed By: nateanl, mthrok

Differential Revision: D41897772

Pulled By: carolineechen

fbshipit-source-id: e20540c6f302b5dcc56663a2c074b14a48e4d3e1

.github/process_commit.py

@@ -20,7 +20,8 @@ PRIMARY_LABELS = {
     "bug fix",
     "new feature",
     "improvement",
-    "example",
+    "tutorial",
+    "recipe",
     "prototype",
     "other",
 }