[PWGLF] Update type alias in lambda1520_PbPb.cxx

[BongHwi]

• Updated the type alias from aod::ResoCollisions to aod::ResoCollisionDFs to match the latest framework changes.

[alibuild]

Error while checking build/O2Physics/o2 for 55e95cb at 2025-01-27 11:52:

## sw/BUILD/O2Physics-latest/log
/sw/slc9_x86-64/O2/daily-20250127-0000-local1/include/Framework/GroupedCombinations.h:45:49: error: static assertion failed: No matching index column from associated to grouping
/sw/slc9_x86-64/O2/daily-20250127-0000-local1/include/Framework/Pack.h:59:7: error: invalid use of incomplete type 'struct o2::framework::pack_element<0, o2::framework::pack<> >'
/sw/slc9_x86-64/O2/daily-20250127-0000-local1/include/Framework/GroupedCombinations.h:47:195: error: no matching function for call to 'o2::framework::expressions::BindingNode::BindingNode(<brace-enclosed initializer list>)'
ninja: build stopped: subcommand failed.

Full log here.

[BongHwi]

I think it's done, @dmallick2 Could you appove it again?

[BongHwi]

Thanks, @njacazio !

[alibuild]

Error while checking build/O2Physics/o2 for da59512 at 2025-01-27 14:16:

## sw/BUILD/O2Physics-latest/log
[FATAL] Unhandled o2::framework::runtime_error reached the top of main of /sw/BUILD/39dead95d3a59b429afd5e7df71c97440a52fbfe/O2Physics/stage/bin/o2-analysis-lf-lambda1520-pbpb, device shutting down. Reason: Preslice not valid: table "ResoTrackDFs" (or join based on it) does not have column "fIndexResoCollisions"
ninja: build stopped: subcommand failed.

Full log here.