dt-bindings: bq25980: Fixup the example

Use the ti,watchdog-timeout-ms property instead of the unsupported
ti,watchdog-timer property to make the example validate correctly.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20211206152905.226239-1-thierry.reding@gmail.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/power/supply/bq25980.yaml

@@ -105,7 +105,7 @@ examples:
           reg = <0x65>;
           interrupt-parent = <&gpio1>;
           interrupts = <16 IRQ_TYPE_EDGE_FALLING>;
-          ti,watchdog-timer = <0>;
+          ti,watchdog-timeout-ms = <0>;
           ti,sc-ocp-limit-microamp = <2000000>;
           ti,sc-ovp-limit-microvolt = <17800000>;
           monitored-battery = <&bat>;