test: update macro expansion test collateral for beta toolchain

Author: wmmc88

tests/wdk-macros-tests/tests/outputs/beta/macrotest/bug_unused_imports.expanded.rs

@@ -86,7 +86,7 @@ pub extern "system" fn driver_entry(
                             ::core::panicking::panic_fmt(
                                 format_args!(
                                     "internal error: entered unreachable code: {0}",
-                                    format_args!("Option should never be None")
+                                    format_args!("Option should never be None"),
                                 ),
                             );
                         };

tests/wdk-macros-tests/tests/outputs/beta/macrotest/wdf_driver_create.expanded.rs

@@ -63,7 +63,7 @@ pub extern "system" fn driver_entry(
                             ::core::panicking::panic_fmt(
                                 format_args!(
                                     "internal error: entered unreachable code: {0}",
-                                    format_args!("Option should never be None")
+                                    format_args!("Option should never be None"),
                                 ),
                             );
                         };