compile dataset script: explicitly call it

I don't have the will to debug this:

```
$ podman run quay.io/log-detective/website:latest compile_extraction_dataset.py
/bin/env: 'python': No such file or directory

$ podman run quay.io/log-detective/website:latest python3 compile_extraction_dataset.py
python3: can't open file '/src/backend/compile_extraction_dataset.py':
[Errno 2] No such file or directory
```

hence calling the script explicitly, like in stone age

Signed-off-by: Tomas Tomecek <ttomecek@redhat.com>

files/compile_extraction_dataset.py

@@ -1,4 +1,5 @@
-#!/bin/env python
+#!/bin/env python3
+# just 'python' doesn't work in container environment -_^
 # You need to have access to the HF dataset repo
 # Set it in the HF_TOKEN env var
 

openshift/dataset-cron.yaml

@@ -17,7 +17,8 @@ spec:
           containers:
           - name: upload-dataset
             image: quay.io/log-detective/website:latest
-            command: ["/compile_extraction_dataset.py"]
+            # for some reason we need to explicitly call the command like this -_-
+            command: ["python3", "/usr/bin/compile_extraction_dataset.py"]
             env:
             - name: HF_TOKEN
               valueFrom: