[PWGCF] correcting the ordering of indices in mixed phi process function for running corr task

[prottayCMT]

No description provided.

[github-actions]

O2 linter results: ❌ 28 errors, ⚠️ 22 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/o2 for 90d6bda at 2026-04-25 01:02:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGCF/TableProducer/filter2Prong.cxx:924:49: error: narrowing conversion of 's.ROOT::Math::LorentzVector<ROOT::Math::PtEtaPhiM4D<double> >::pt()' from 'ROOT::Math::LorentzVector<ROOT::Math::PtEtaPhiM4D<double> >::Scalar' {aka 'double'} to 'float' [-Werror=narrowing]
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGCF/TableProducer/filter2Prong.cxx:925:50: error: narrowing conversion of 's.ROOT::Math::LorentzVector<ROOT::Math::PtEtaPhiM4D<double> >::eta()' from 'ROOT::Math::LorentzVector<ROOT::Math::PtEtaPhiM4D<double> >::Scalar' {aka 'double'} to 'float' [-Werror=narrowing]
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGCF/TableProducer/filter2Prong.cxx:927:48: error: narrowing conversion of 's.ROOT::Math::LorentzVector<ROOT::Math::PtEtaPhiM4D<double> >::M()' from 'ROOT::Math::LorentzVector<ROOT::Math::PtEtaPhiM4D<double> >::Scalar' {aka 'double'} to 'float' [-Werror=narrowing]
ninja: build stopped: subcommand failed.

Full log here.

[prottayCMT]

@jgrosseo could you please approve this PR?