cuda_specs.py: fix version tag string for ROCm/CUDA library lookup#1889

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eliasmagn wants to merge 1 commit intobitsandbytes-foundation:mainfrom

Commits on Mar 5, 2026

Replaced the incorrect `major * 10 + minor` logic (e.g. ROCm 7.12 → "82"; CUDA breaks when minor > 9) with simple string concatenation, producing the expected tags:
eliasmagn
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