Demo ci check (#12530)

* Remove branch checking in workflow files

* Detect demo branch based on software version

* Fix typo

tasks.py

@@ -1846,7 +1846,7 @@ def test(
         'keep': 'Keep existing demo dataset (do not re-clone)',
         'validate_files': 'Validate media files are correctly copied',
         'use_ssh': 'Use SSH protocol for cloning the demo dataset (requires SSH key)',
-        'branch': 'Specify branch of demo-dataset to clone (default = main)',
+        'branch': 'Specify branch of demo-dataset to clone',
         'verbose': 'Print verbose output from management commands',
     }
 )
@@ -1859,7 +1859,7 @@ def setup_test(
     use_ssh: bool = False,
     verbose: bool = False,
     path: str = 'inventree-demo-dataset',
-    branch='main',
+    branch: Optional[str] = None,
 ):
     """Setup a testing environment."""
     from src.backend.InvenTree.InvenTree.config import (  # type: ignore[import]
@@ -1882,6 +1882,16 @@ def setup_test(
             # Use SSH protocol for cloning the demo dataset
             URL = 'git@github.com:inventree/demo-dataset.git'
 
+        if not branch:
+            # No branch specified - determine the InvenTree version
+            version = get_inventree_version()
+
+            # If the version is a stable release (e.g. "1.4.3")
+            # then we can try to use the corresponding branch in the demo-dataset repository
+            # (e.g. "1.4.x")
+            if re.match(r'^\d+\.\d+\.\d+$', version):
+                branch = f'{version.rsplit(".", 1)[0]}.x'
+
         # InvenTree's trunk branch is named "master", but the demo-dataset
         # repository uses "main" as its trunk branch - map this automatically
         # so CI can pass through the detected target branch unmodified.