fix(hipblas): pin down rocm6.4 wheels on whisperx (7.x not supported)

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

Author: mudler

backend/python/whisperx/requirements-hipblas.txt

@@ -1,3 +1,6 @@
---extra-index-url https://download.pytorch.org/whl/rocm7.0
-torch==2.10.0+rocm7.0
+# whisperx hard-pins torch~=2.8.0, which is not available in the rocm7.x indexes
+# (they start at torch 2.10). Keep rocm6.4 wheels here — they still load against
+# the rocm7.2.1 runtime via AMD's forward-compatibility window.
+--extra-index-url https://download.pytorch.org/whl/rocm6.4
+torch==2.8.0+rocm6.4
 whisperx @ git+https://github.com/m-bain/whisperX.git