fixup! docs(core.utils): clarify per-backend fingerprint scope in cross-version note

Author: cpcloud

cuda_core/cuda/core/utils/_program_cache.py

@@ -1071,8 +1071,11 @@ class FileStreamProgramCache(ProgramCacheResource):
         ``_FILESTREAM_SCHEMA_VERSION`` guards on-disk format changes: a
         cache written by an incompatible version is wiped on open. Within
         a single schema version, the cache is safe to share across
-        ``cuda.core`` patch releases because every entry's key already
-        encodes ``cuda_core``, NVRTC, NVVM, driver, and linker fingerprints.
+        ``cuda.core`` patch releases because every entry's key encodes
+        the relevant backend/compiler/runtime fingerprints for its
+        compilation path (NVRTC entries pin the NVRTC version, NVVM
+        entries pin the NVVM IR version, PTX/linker entries pin the
+        chosen linker backend, its version, and the driver version).
 
     Parameters
     ----------