ci: simplify the linter implementations

Author: projectgus

.github/workflows/lint.yml

@@ -1,10 +1,14 @@
 on: [push, pull_request]
 name: Python Linting
 jobs:
-  PythonLinting:
-    name: Python linting
+  black:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@master
-      - name: Konstruktoid Python linting
-        uses: konstruktoid/[email protected]
+      - uses: actions/checkout@v2
+      - uses: psf/black@stable
+  flake8:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: TrueBrain/actions-flake8@v2
+