LibJS: Fix two typos in comments

Userland/Libraries/LibJS/Runtime/Error.cpp

@@ -76,7 +76,7 @@ String Error::stack_string() const
     StringBuilder stack_string_builder;
     // Note: We roughly follow V8's formatting
     // Note: The error's name and message get prepended by ErrorPrototype::stack
-    // Note: We don't want to capture the global exectution context, so we omit the last frame
+    // Note: We don't want to capture the global execution context, so we omit the last frame
     // FIXME: We generate a stack-frame for the Errors constructor, other engines do not
     for (size_t i = 0; i < m_traceback.size() - 1; ++i) {
         auto const& frame = m_traceback[i];

Userland/Libraries/LibJS/Runtime/FinalizationRegistryPrototype.cpp

@@ -41,7 +41,7 @@ JS_DEFINE_NATIVE_FUNCTION(FinalizationRegistryPrototype::cleanup_some)
     if (vm.argument_count() > 0 && !callback.is_function())
         return vm.throw_completion<TypeError>(global_object, ErrorType::NotAFunction, callback.to_string_without_side_effects());
 
-    // IMPLEMENTATION DEFINED: The specification for this function hasn't been updated to accomodate for JobCallback records.
+    // IMPLEMENTATION DEFINED: The specification for this function hasn't been updated to accommodate for JobCallback records.
     //                         This just follows how the constructor immediately converts the callback to a JobCallback using HostMakeJobCallback.
     TRY(finalization_registry->cleanup(callback.is_undefined() ? Optional<JobCallback> {} : vm.host_make_job_callback(callback.as_function())));