PWGCF : Femtouniverse -- Fixing bug in dphi calculation

The extra factor of 0.1 that was scaling the magnetic field is removed.
However, after removing this factor, the asin() function for calculating dphi was blowing up at certain (mostly higher) values of radii. This is also taken care of by only allowing abs() < 1.0.

Author: prchakra

PWGCF/FemtoUniverse/Core/FemtoUniverseDetaDphiStar.h

@@ -1,6 +1,6 @@
 // Copyright 2019-2022 CERN and copyright holders of ALICE O2.
-// See https://alice-o2.web.cern.ch/copyright for details of the copyright
-// holders. All rights not expressly granted are reserved.
+// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
+// All rights not expressly granted are reserved.
 //
 // This software is distributed under the terms of the GNU General Public
 // License v3 (GPL Version 3), copied verbatim in the file "COPYING".
@@ -10,9 +10,10 @@
 // or submit itself to any jurisdiction.
 
 /// \file FemtoUniverseDetaDphiStar.h
-/// \brief FemtoUniverseDetaDphiStar - Checks particles for the close pair
-/// rejection. \author Laura Serksnyte, TU München, laura.serksnyte@tum.de
+/// \brief FemtoUniverseDetaDphiStar - Checks particles for the close pair rejection.
+/// \author Laura Serksnyte, TU München, laura.serksnyte@tum.de
 /// \author Zuzanna Chochulska, WUT Warsaw & CTU Prague, zchochul@cern.ch
+/// \author Pritam Chakraborty, WUT Warsaw, pritam.chakraborty@cern.ch
 
 #ifndef PWGCF_FEMTOUNIVERSE_CORE_FEMTOUNIVERSEDETADPHISTAR_H_
 #define PWGCF_FEMTOUNIVERSE_CORE_FEMTOUNIVERSEDETADPHISTAR_H_