Kernel: Fix type, dectivate_writes => deactivate_writes

Author: https://github.com/supercomputer7
Commit: 09d09b79b6
Pull-request: https://github.com/SerenityOS/serenity/pull/7258
Issue: https://github.com/SerenityOS/serenity/issues/7241
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/tomuta

Kernel/Graphics/VGACompatibleAdapter.cpp

@@ -59,7 +59,7 @@ void VGACompatibleAdapter::enable_consoles()
 {
     VERIFY(m_framebuffer_console);
     if (m_framebuffer_device)
-        m_framebuffer_device->dectivate_writes();
+        m_framebuffer_device->deactivate_writes();
     m_framebuffer_console->enable();
 }
 void VGACompatibleAdapter::disable_consoles()