Enable issue intents on issue-triage workflow

Recompile issue-triage.lock.yml with gh-aw v0.82.1 to wire
GH_AW_RUNTIME_FEATURES=${{ vars.GH_AW_RUNTIME_FEATURES }}, enabling native
issue intents (rationale/confidence) for the workflow's add-labels safe
output. No behavior change: the trigger, permissions, prompt, and safe
outputs are unchanged, and the source .md is untouched.

The actions-lock.json pin bump (github/gh-aw-actions/setup v0.82.1) is
required by the recompiled lock.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: lukewar

.github/aw/actions-lock.json

@@ -25,10 +25,10 @@
       "version": "v7.0.0",
       "sha": "bbbca2ddaa5d8feaa63e36b76fdaad77386f024f"
     },
-    "github/gh-aw-actions/setup@v0.77.5": {
+    "github/gh-aw-actions/setup@v0.82.1": {
       "repo": "github/gh-aw-actions/setup",
-      "version": "v0.77.5",
-      "sha": "3ea13c02d765410340d533515cb31a7eef2baaf0"
+      "version": "v0.82.1",
+      "sha": "dadd6a0a0f4d1087fbd3e115776f28471388d6db"
     },
     "github/gh-aw/actions/setup@v0.52.1": {
       "repo": "github/gh-aw/actions/setup",