docs: Update empty-dir.md (#6987)

Fix typo

Signed-off-by: Fabrice Jammes <fabrice.jammes@in2p3.fr>

docs/empty-dir.md

@@ -2,7 +2,7 @@
 
 While by default, the Docker and PNS [workflow executors](workflow-executors.md) can get output artifacts/parameters from the base layer (e.g. `/tmp`), neither the Kubelet nor the K8SAPI executors can. It is unlikely you can get output artifacts/parameters from the base layer if you run your workflow pods with a [security context](workflow-pod-security-context.md).
 
-You can work-around this constraint by mounting volumes onto your pod. The easiest way to do this is to use as `emptytDir` volume. 
+You can work-around this constraint by mounting volumes onto your pod. The easiest way to do this is to use as `emptyDir` volume. 
 
 !!! Note 
     This is only needed for output artifacts/parameters. Input artifacts/parameters are automatically mounted to an empty-dir if needed