docs: hwmon: fix link to g762 devicetree binding

The devicetree binding for g762 was converted to YAML to match vendor
prefix conventions. Update the reference accordingly.

Signed-off-by: Kathara Sasikumar <katharasasikumar007@gmail.com>
Link: https://lore.kernel.org/r/20251205215835.783273-1-katharasasikumar007@gmail.com
Fixes: 3d8e253 ("dt-bindings: hwmon: g762: Convert to yaml schema")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Author: Katharaa

Documentation/hwmon/g762.rst

@@ -17,7 +17,7 @@ done via a userland daemon like fancontrol.
 Note that those entries do not provide ways to setup the specific
 hardware characteristics of the system (reference clock, pulses per
 fan revolution, ...); Those can be modified via devicetree bindings
-documented in Documentation/devicetree/bindings/hwmon/g762.txt or
+documented in Documentation/devicetree/bindings/hwmon/gmt,g762.yaml or
 using a specific platform_data structure in board initialization
 file (see include/linux/platform_data/g762.h).