Documentation: scheduler: Changed lowercase acronyms to uppercase

Everywhere else in this doc, the dispatch queue acronym (DSQ) is
uppercase. There were a couple places where the acronym was written in
lowercase. I changed them to uppercase to make it homogeneous.

Signed-off-by: Jake Rice <jake@jakerice.dev>
Signed-off-by: Tejun Heo <tj@kernel.org>

Documentation/scheduler/sched-ext.rst

@@ -197,8 +197,8 @@ Dispatch Queues
 To match the impedance between the scheduler core and the BPF scheduler,
 sched_ext uses DSQs (dispatch queues) which can operate as both a FIFO and a
 priority queue. By default, there is one global FIFO (``SCX_DSQ_GLOBAL``),
-and one local dsq per CPU (``SCX_DSQ_LOCAL``). The BPF scheduler can manage
-an arbitrary number of dsq's using ``scx_bpf_create_dsq()`` and
+and one local DSQ per CPU (``SCX_DSQ_LOCAL``). The BPF scheduler can manage
+an arbitrary number of DSQs using ``scx_bpf_create_dsq()`` and
 ``scx_bpf_destroy_dsq()``.
 
 A CPU always executes a task from its local DSQ. A task is "inserted" into a