fix: Link digi library for BEMC plugin (#2171)

### Briefly, what does this PR introduce?
Now that BEMC uses digitization (PulseGeneration), we need to link.

### What kind of change does this PR introduce?
- [x] Bug fix (issue: BEMC undefined symbol
_ZN8eicrecon15PulseGenerationIN7edm4hep17SimCalorimeterHitEE4initEv)
- [ ] New feature (issue #__)
- [ ] Documentation update
- [ ] Other: __

### Please check if this PR fulfills the following:
- [ ] Tests for the changes have been added
- [ ] Documentation has been added / updated
- [ ] Changes have been communicated to collaborators

### Does this PR introduce breaking changes? What changes might users
need to make to their code?
No.

### Does this PR change default behavior?
No.

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: wdconinc

src/detectors/BEMC/CMakeLists.txt

@@ -17,4 +17,5 @@ plugin_add_event_model(${PLUGIN_NAME})
 plugin_add_eigen3(${PLUGIN_NAME})
 
 # Add libraries (works same as target_include_directories)
-plugin_link_libraries(${PLUGIN_NAME} algorithms_calorimetry_library)
+plugin_link_libraries(${PLUGIN_NAME} algorithms_calorimetry_library
+                      algorithms_digi_library)