note about environment variables

.github/workflows/ci.yml

@@ -7,6 +7,7 @@ on:
     branches:
       - release-*
 
+# Environment variables must be kept in sync with all workflows that defines them.
 env:
   CARGO_TERM_COLOR: always
   CARGO_INCREMENTAL: 0

.github/workflows/example-run.yml

@@ -8,6 +8,7 @@ on:
     branches:
       - main
 
+# Environment variables must be kept in sync with all workflows that defines them.
 env:
   CARGO_TERM_COLOR: always
   CARGO_INCREMENTAL: 0

.github/workflows/update-caches.yml

@@ -11,6 +11,7 @@ on:
   schedule:
     - cron: "0 1 * * *"
 
+# Environment variables must be kept in sync with all workflows that defines them.
 env:
   CARGO_INCREMENTAL: 0
   CARGO_PROFILE_TEST_DEBUG: 0

.github/workflows/validation-jobs.yml

@@ -11,6 +11,7 @@ concurrency:
   group: ${{github.workflow}}-${{github.ref}}
   cancel-in-progress: ${{github.event_name == 'pull_request'}}
 
+# Environment variables must be kept in sync with all workflows that defines them.
 env:
   CARGO_TERM_COLOR: always
   CARGO_INCREMENTAL: 0