Update CI action versions

Author: evaherrada

.github/workflows/githubci.yml

@@ -12,8 +12,8 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
-    - uses: actions/setup-python@v1
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v4
       with:
         python-version: '3.x' # Version range or exact version of a Python version to use, using semvers version range syntax.
         architecture: 'x64' # optional x64 or x86. Defaults to x64 if not specified

README.md

@@ -24,7 +24,7 @@ You can clone and checkout this repo in a GitHub Actions workflow file using
 
 ```yaml
 - name: Checkout tools repo
-  uses: actions/checkout@v2
+  uses: actions/checkout@v3
   with:
     repository: adafruit/actions-ci-circuitpython-libs
     path: actions-ci