update git workflows

Former-commit-id: 4c4f950f3936edbce84796c9a5e11b61ea07864e

.github/workflows/label_issue.yml

@@ -0,0 +1,17 @@
+name: label_issue
+
+on:
+  issues:
+    types:
+      - opened
+
+jobs:
+  label_issue:
+    runs-on: ubuntu-latest
+
+    steps:
+      - env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ISSUE_URL: ${{ github.event.issue.html_url }}
+        run: |
+          gh issue edit $ISSUE_URL --add-label "pending"

.github/workflows/tests.yml

@@ -3,14 +3,7 @@ name: tests
 on:
   push:
     branches:
-      - main
-    paths:
-      - "**.py"
-      - "requirements.txt"
-      - ".github/workflows/*.yml"
-  pull_request:
-    branches:
-      - main
+      - $default-branch
     paths:
       - "**.py"
       - "requirements.txt"
@@ -19,21 +12,27 @@ on:
 jobs:
   tests:
     runs-on: ubuntu-latest
+
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout
+        uses: actions/checkout@v4
+
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
           python-version: "3.8"
           cache: "pip"
           cache-dependency-path: "setup.py"
+
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
           python -m pip install .[torch,dev]
+
       - name: Check quality
         run: |
           make style && make quality
+
       - name: Test with pytest
         run: |
           make test