chore(ci): exempt roadmap issues from stale handling

Signed-off-by: Taylor Mutch <taylormutch@gmail.com>

Author: TaylorMutch

.github/workflows/stale.yml

@@ -26,7 +26,7 @@ jobs:
           operations-per-run: 300
           sort-by: updated
 
-          exempt-issue-labels: lifecycle:frozen,state:frozen
+          exempt-issue-labels: lifecycle:frozen,state:frozen,roadmap
           close-issue-reason: not_planned
 
           stale-issue-message: >

CONTRIBUTING.md

@@ -432,7 +432,7 @@ See [docs/CONTRIBUTING.mdx](docs/CONTRIBUTING.mdx) for the current docs authorin
 
 ## Stale Issues and Pull Requests
 
-Issues receive `state:stale` after 28 days without activity; pull requests receive it after 14 days. Only `lifecycle:frozen` or `state:frozen` exempts an issue from stale handling. Both labels are supported while the naming convention is being decided. Issues close after another 14 days without activity; pull requests are not automatically closed. Comment on an item to reset the inactivity timer and remove its stale label.
+Issues receive `state:stale` after 28 days without activity; pull requests receive it after 14 days. Issues labeled `roadmap`, `lifecycle:frozen`, or `state:frozen` are exempt from stale handling. Both frozen labels are supported while the naming convention is being decided. Issues close after another 14 days without activity; pull requests are not automatically closed. Comment on an item to reset the inactivity timer and remove its stale label.
 
 ## Pull Requests