Correct the :type of pytest at point debug template (#745)

The `:type` of the debug template "Python :: Run pytest (at point)" should match the "LANGUAGE-ID" argument of the function (dap-register-debug-provider), otherwise the "PROVIDE-CONFIGURATION-FN" is not called.

Author: gamboz

dap-python.el

@@ -294,7 +294,7 @@ strings, for the sake of launch.json feature parity."
 
 (dap-register-debug-provider "python-test-at-point" 'dap-python--populate-test-at-point)
 (dap-register-debug-template "Python :: Run pytest (at point)"
-                             (list :type "python"
+                             (list :type "python-test-at-point"
                                    :args ""
                                    :program nil
                                    :module "pytest"