docs: update action versions in README.md (#33)

Author: divmain

README.md

@@ -130,12 +130,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       # add Socket Firewall to the runner environment
-      - uses: socketdev/action@v1
+      - uses: socketdev/action@ba6de6cc0565af1f42295590380973573297e31f
         with:
           mode: firewall-free
 
       # setup your project (e.g. checkout, setup-node, etc...)
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@0c366fd6a839edf440554fa01a7085ccba70ac98
 
       # example usage
       - run: sfw npm ci