[Snyk] Fix for 3 vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-REQUESTS-10305723
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-10390193
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-10390194

.github/workflows/codecov.yaml

@@ -15,6 +15,6 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4    
+    - uses: actions/checkout@v3    
     - name: Upload coverage reports to Codecov
       uses: codecov/codecov-action@v3

.github/workflows/python-app.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v3
     - name: Set up Python 3.11
       uses: actions/setup-python@v4
       with:

.github/workflows/static.yml

@@ -29,7 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
       - name: Setup Pages
         uses: actions/configure-pages@v3
       - name: Upload artifact

requirements.txt

@@ -4,4 +4,5 @@ discord.py==2.2.2
 emoji==2.2.0
 prettytable==3.6.0
 psutil==5.9.4
-requests==2.28.2
+requests==2.32.4
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability