_fbgemm_torch_compat_table is outdated and emits false compatibility warnings

[bwnotfound]

Environment:

• fbgemm_gpu==1.6.0+cu126
• torch==2.11.0+cu126

Current behavior:
Importing fbgemm_gpu prints a warning because
_fbgemm_torch_compat_table has no entry for FBGEMM 1.6.0.

Expected behavior:
No warning should be emitted if the version combination is officially
supported or known to work.

Notes:
The table currently contains only:
{"1.5": "2.10"}

Updating the compatibility mappings (or relaxing the check) would prevent
misleading warnings on newer releases.