tools/lib/thermal: Fix include path for libnl3 in pkg-config file.

Fixes pkg-config returning malformed CFLAGS for libthermal.
Signed-off-by: NVibhav Pant <vibhavp@gmail.com>
Link: https://lore.kernel.org/r/20230211081935.62690-1-vibhavp@gmail.comSigned-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

tools/lib/thermal/libthermal.pc.template

@@ -9,4 +9,4 @@ Description: thermal library
 Requires: libnl-3.0 libnl-genl-3.0
 Version: @VERSION@
 Libs: -L${libdir} -lnl-genl-3 -lnl-3
-Cflags: -I${includedir} -I{include}/libnl3
+Cflags: -I${includedir} -I${include}/libnl3