Merge pull request pyqtgraph#3013 from pyqtgraph/dependabot/pip/dot-github/workflows/etc/pytest-xdist-3.6.1

Bump pytest-xdist from 3.5.0 to 3.6.1 in /.github/workflows/etc

Author: j9ac9k

.github/workflows/etc/requirements.txt

@@ -18,5 +18,5 @@ h5py==3.11.0
 
 # testing
 pytest==8.2.0
-pytest-xdist==3.5.0
+pytest-xdist==3.6.1
 pytest-xvfb==3.0.0; sys_platform == 'linux'