Reorder cached pipeline definition mapping by Def ID

[Copilot]

Addresses the single requested PR review comment by updating only the cached mapping table ordering in the CI pipeline monitor skill docs. No functional or scope-expanding edits were made.

• Description

  • Reordered entries in /home/runner/work/runtime/runtime/.github/skills/ci-pipeline-monitor/pipelines.md under Cached Definition ID Mapping so rows are in ascending numeric Def ID order.
  • Moved existing crossgen2 mapping rows (124, 134, 136, 141) to their correct sorted positions relative to surrounding entries.

• Change shape

  • Data-preserving table reorder only (no new rows, no removed rows, no content rewrite).

| runtime-coreclr libraries-jitstress2-jitstressregs | 119 | |
| runtime-coreclr crossgen2 | 124 | |
| runtime-coreclr crossgen2 outerloop | 134 | |
| runtime-coreclr crossgen2-composite | 136 | |
| runtime-jit-experimental | 137 | |
| runtime-coreclr libraries-jitstress | 138 | |
| runtime-coreclr ilasm | 140 | |
| runtime-coreclr crossgen2-composite gcstress | 141 | |