update version number in docs

Author: jnewland

README.md

@@ -19,7 +19,7 @@ on:
       #  deploy:
       #    steps:
 
-      - uses: urcomputeringpal/label-mutex@v0.3.0
+      - uses: urcomputeringpal/label-mutex@v0.4.0
         id: label-mutex
         env:
           AWS_DEFAULT_REGION: us-east-1
@@ -54,7 +54,7 @@ on:
       #  unlock:
       #    steps:
 
-      - uses: urcomputeringpal/label-mutex@v0.3.0
+      - uses: urcomputeringpal/label-mutex@v0.4.0
         id: label-mutex
         env:
           AWS_DEFAULT_REGION: us-east-1

action.yml

@@ -34,4 +34,4 @@ outputs:
 runs:
   using: docker
   image: Dockerfile
-  # image: 'docker://urcomputeringpal/label-mutex:v0.3.0'
+  # image: 'docker://urcomputeringpal/label-mutex:v0.4.0'