specify the hours instead of an interval so that the posting is staggered

.gitea/workflows/dog_facts.yaml

@@ -1,7 +1,7 @@
 name: DogFacts
 on:
   schedule:
-    - cron: '13 */4 * * *'
+    - cron: '13 4,8,12,16,20,00 * * *'
   workflow_dispatch:
     
 jobs:
@@ -15,7 +15,7 @@ jobs:
           python-version: "3.13"
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
+          python3 -m pip install --upgrade pip
           if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
       - name: Run dog_facts.py
         run: