doc: fix typos in node.1

doc/node.1

@@ -318,7 +318,7 @@ If set to 1 then colors will not be used in the REPL.
         type: bool  default: false
   --use_idle_notification (Use idle notification to reduce memory footprint.)
         type: bool  default: true
-  --send_idle_notification (Send idle notifcation between stress runs.)
+  --send_idle_notification (Send idle notification between stress runs.)
         type: bool  default: false
   --use_ic (use inline caching)
         type: bool  default: true
@@ -346,7 +346,7 @@ If set to 1 then colors will not be used in the REPL.
         type: bool  default: false
   --stop_sim_at (Simulator stop after x number of instructions)
         type: int  default: 0
-  --sim_stack_alignment (Stack alingment in bytes in simulator (4 or 8, 8 is default))
+  --sim_stack_alignment (Stack alignment in bytes in simulator (4 or 8, 8 is default))
         type: int  default: 8
   --trace_exception (print stack trace when throwing exceptions)
         type: bool  default: false
@@ -400,7 +400,7 @@ If set to 1 then colors will not be used in the REPL.
         type: bool  default: false
   --gdbjit_dump_filter (dump only objects containing this substring)
         type: string  default: 
-  --force_marking_deque_overflows (force overflows of marking deque by reducing it's size to 64 words)
+  --force_marking_deque_overflows (force overflows of marking deque by reducing its size to 64 words)
         type: bool  default: false
   --stress_compaction (stress the GC compactor to flush out bugs (implies --force_marking_deque_overflows))
         type: bool  default: false