doc: Update README with correct version number (#1413)

Author: Jason3S

README.md

@@ -16,14 +16,14 @@ jobs:
   spellcheck: # run the action
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: streetsidesoftware/cspell-action@v3
+      - uses: actions/checkout@v4
+      - uses: streetsidesoftware/cspell-action@v4
 ```
 
 ## Usage
 
 ```yaml
-- uses: streetsidesoftware/cspell-action@v3
+- uses: streetsidesoftware/cspell-action@v4
   with:
     # Github token used to fetch the list of changed files in the commit.
     # Default: ${{ github.token }}

usage.yaml

@@ -1,4 +1,4 @@
-- uses: streetsidesoftware/cspell-action@v1
+- uses: streetsidesoftware/cspell-action@v4
   with:
     # Github token used to fetch the list of changed files in the commit.
     # Default: ${{ github.token }}