[Chapel Merge] Update TaskErrors doc references for nilability

Branch: refs/heads/main
Revision: cd06ad7
Author: bmcdonald3
Link: Update TaskErrors doc references for nilability by bmcdonald3 · Pull Request #20403 · chapel-lang/chapel · GitHub
Log Message:

Merge pull request #20403 from bmcdonald3/task-errors-docs

Update TaskErrors doc references for nilability

[ trivial, not reviewed ]

Closes #20289

Modified Files:
M doc/rst/language/spec/error-handling.rst

Compare: https://github.com/chapel-lang/chapel/compare/c26025720eb3...cd06ad7c774b