ci: remove redundant shell specification

Author: consideRatio

.github/workflows/test.yaml

@@ -30,9 +30,6 @@ env:
 jobs:
   build:
     runs-on: ubuntu-22.04
-    defaults:
-      run:
-        shell: bash
     steps:
       - uses: actions/checkout@v4
 
@@ -68,6 +65,11 @@ jobs:
       nb${{ matrix.notebook-version }}
     needs: [build]
     timeout-minutes: 30
+    runs-on: ${{ matrix.os }}
+    defaults:
+      run:
+        shell: bash # windows default isn't bash
+
     strategy:
       fail-fast: false
       matrix:
@@ -94,11 +96,6 @@ jobs:
           - jupyter_server-version: "1"
             jupyterlab-version: "4"
 
-    runs-on: ${{ matrix.os }}
-    defaults:
-      run:
-        shell: bash
-
     steps:
       - uses: actions/checkout@v4