Fix typo in gdbinit (worket -> worker)

Change-Id: I0c3edddaad5ccf8522c40a8e1572ae3d3b448c26
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1987283Reviewed-by: Christian Biesinger <cbiesinger@chromium.org>
Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Auto-Submit: David Grogan <dgrogan@chromium.org>
Commit-Queue: David Grogan <dgrogan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#728686}

tools/gdb/gdbinit

@@ -99,7 +99,7 @@ gdb.execute("set environment CHROMIUM_GDBINIT_SOURCED=1")
 # use try..except to avoid displaying errors in earlier GDB versions.
 try:
   # unlimited means "number of cores"
-  gdb.execute("maint set worket-threads unlimited")
+  gdb.execute("maint set worker-threads unlimited")
 except:
   pass