Fix placecholder debug workflow

.github/workflows/custom_dispatch_tests.yml

@@ -0,0 +1,27 @@
+name: Custom dispatch tests
+
+on:
+  workflow_dispatch:
+    inputs:
+      pytest_markexpr:
+        description: 'Expression for pytest -m'
+        required: false
+        default: 'not remote'
+        type: string
+      os:
+        description: 'OS to test on'
+        required: true
+        default: 'ubuntu-latest'
+        type: choice
+        options: ["ubuntu-latest", "windows-latest", "windows-2022", "macos-latest", "macos-15-intel"]
+      python:
+        description: 'Python version'
+        required: true
+        default: '3.13'
+        type: choice
+        options: ['3.10', '3.11', '3.12', '3.13']
+      tmate:
+        description: 'Enable tmate debugging session'
+        required: false
+        default: false
+        type: boolean