MAINTAINERS: adjust entry in THERMAL/POWER_ALLOCATOR after header movement

Commit 32a7a02117de ("thermal/core: Relocate the traces definition in
thermal directory") moves include/trace/events/thermal_power_allocator.h to
drivers/thermal/thermal_trace_ipa.h, but misses to adjust the file
entry for the THERMAL/POWER_ALLOCATOR section.

Hence, ./scripts/get_maintainer.pl --self-test=patterns complains about a
broken reference.

Adjust this file entry in THERMAL/POWER_ALLOCATOR.

Signed-off-by: Lukas Bulwahn <[e-mail]>
Reviewed-by: Lukasz Luba <[e-mail]>
Signed-off-by: Daniel Lezcano <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

MAINTAINERS

···
 S:	Maintained
 F:	Documentation/driver-api/thermal/power_allocator.rst
 F:	drivers/thermal/gov_power_allocator.c
-F:	include/trace/events/thermal_power_allocator.h
+F:	drivers/thermal/thermal_trace_ipa.h
 
 THINKPAD ACPI EXTRAS DRIVER
 M:	Henrique de Moraes Holschuh <[e-mail]>