Add test for cancel by name (#40)

Add a test for #39 and update docs

.github/workflows/main.yml

@@ -6,13 +6,13 @@ jobs:
   cancel:
     runs-on: ubuntu-latest
     name: Cancel
-    timeout-minutes: 3
+    timeout-minutes: 4
     steps:
       # To use this repository's private action, you must check out the repository
       - name: Checkout
         uses: actions/checkout@v2
       - name: Test Step
         uses: ./ # Uses an action in the root directory
         with:
-          workflow_id: 479426, 830809
+          workflow_id: 479426, 830809, sleep120.yml
           access_token: ${{ github.token }}

.github/workflows/sleep120.yml

@@ -0,0 +1,11 @@
+name: Sleep120
+
+on: [push]
+
+jobs:
+  task:
+    runs-on: ubuntu-latest
+    name: Task
+    steps:
+      - uses: actions/setup-node@v1
+      - run: echo 'Sleeping...'; sleep 120; echo 'Done.';

README.md

@@ -52,7 +52,8 @@ jobs:
           access_token: ${{ github.token }}
 ```
 
-_Note_: `workflow_id` accepts a comma separated list of IDs.
+- _Note_: `workflow_id` can be a Workflow ID (number) or Workflow File Name (string)
+- _Note_: `workflow_id` also accepts a comma separated list if you need to cancel multiple workflows
 
 At the time of writing `0.5.0` is the latest release but you can select any [release](https://github.com/styfle/cancel-workflow-action/releases).