Revert "Update README.md"

This reverts commit 7c6ee5c.

Author: machulav

README.md

@@ -268,7 +268,7 @@ jobs:
           aws-region: ${{ secrets.AWS_REGION }}
       - name: Start EC2 runner
         id: start-ec2-runner
-        uses: machulav/ec2-github-runner@v2.4.2 # Or the latest version we're on
+        uses: machulav/ec2-github-runner@v2
         with:
           mode: start
           github-token: ${{ secrets.GH_PERSONAL_ACCESS_TOKEN }}
@@ -308,7 +308,7 @@ jobs:
           aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
           aws-region: ${{ secrets.AWS_REGION }}
       - name: Stop EC2 runner
-        uses: machulav/ec2-github-runner@v2.4.2 # Or the latest version we're on
+        uses: machulav/ec2-github-runner@v2
         with:
           mode: stop
           github-token: ${{ secrets.GH_PERSONAL_ACCESS_TOKEN }}