otp538u: Patching up doxygen comments

Signed-off-by: John Van Drasek <john.r.van.drasek@intel.com>

src/otp538u/otp538u.h

@@ -34,7 +34,7 @@ namespace upm {
    * @ingroup seeed analog light
    */
   /**
-   * @library libupm-otp538u
+   * @library otp538u
    * @sensor otp538u
    * @comname IR Temperature Sensor
    * @type light