Update "Using conditions to control job execution" Github Actions documentation (#44105)

Co-authored-by: Ben Ahmady <32935794+subatoi@users.noreply.github.com>
Co-authored-by: mc <42146119+mchammer01@users.noreply.github.com>

Author: 3 people

content/actions/how-tos/write-workflows/choose-when-workflows-run/control-jobs-with-conditions.md

@@ -15,7 +15,9 @@ category:
 contentType: how-tos
 ---
 
-You can use the `jobs.<job_id>.if` conditional to prevent a job from running unless a condition is met. {% data reusables.actions.if-supported-contexts %}
+You can use the `jobs.<job_id>.if` conditional to prevent a job from running unless a condition is met. {% data reusables.actions.if-supported-contexts %} 
+
+Note that conditions executed by a shell (for example `[[ $variable == "prefix"* ]]`) cannot be evaluated in `jobs.<job_id>.if`. Such conditions must be written inside `jobs.<job_id>.steps[*].run`.
 
 ### Example: Only run job for a specific repository