Merge pull request #101 from getyourguide/SEC-3079-pin-workflow-actions

SEC-3079 Pin workflow action versions

Author: mariuscoto

.github/main.yml

@@ -9,9 +9,9 @@ jobs:
       matrix:
         python-version: [3.9, 3.8, 3.7]
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2.7.0
     - name: Set up Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@e9aba2c848f5ebd159c070c61ea2c4e2b122355e # v2.3.4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install pip dependencies