Give every step a human name

Author: nedbat

.github/workflows/testsuite.yml

@@ -37,8 +37,11 @@ jobs:
       fail-fast: false
 
     steps:
-      - uses: "actions/checkout@v2"
-      - uses: "actions/setup-python@v2"
+      - name: "Check out the repo"
+        uses: "actions/checkout@v2"
+
+      - name: "Set up Python"
+        uses: "actions/setup-python@v2"
         with:
           python-version: "${{ matrix.python-version }}"