[3.10] Fix typos in the Modules directory (GH-28761) (GH-28781)



(cherry picked from commit dd02a696e55b450413e765e698e653d781ca4205)


Co-authored-by: Christian Clauss <cclauss@me.com>

Automerge-Triggered-By: GH:gpshead
diff --git a/Modules/signalmodule.c b/Modules/signalmodule.c
index a4eeec9..5c4ed18 100644
--- a/Modules/signalmodule.c
+++ b/Modules/signalmodule.c
@@ -1594,7 +1594,7 @@ signal_get_set_handlers(signal_state_t *state, PyObject *mod_dict)
         Py_XDECREF(old_func);
     }
 
-    // Instal Python SIGINT handler which raises KeyboardInterrupt
+    // Install Python SIGINT handler which raises KeyboardInterrupt
     PyObject* sigint_func = get_handler(SIGINT);
     if (sigint_func == state->default_handler) {
         PyObject *int_handler = PyMapping_GetItemString(mod_dict,