[rotary_encoder] Fix templatable value type to use cg.int32 (#15567)

esphome/components/rotary_encoder/sensor.py

@@ -129,6 +129,6 @@ async def to_code(config):
 async def sensor_template_publish_to_code(config, action_id, template_arg, args):
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
-    template_ = await cg.templatable(config[CONF_VALUE], args, int)
+    template_ = await cg.templatable(config[CONF_VALUE], args, cg.int32)
     cg.add(var.set_value(template_))
     return var