Apply ruff/flake8-bugbear rule B008

B008 Do not perform function call in argument defaults; instead, perform
     the call within the function, or read the default from a module-level
     singleton variable

Author: DimitriPapadopoulos

abi3audit/_audit.py

@@ -96,10 +96,12 @@ def __rich_console__(self, console: Console, options: ConsoleOptions) -> RenderR
             yield f"[green]:thumbs_up: {self.so}"
 
 
-def audit(so: SharedObject, assume_minimum_abi3: PyVersion = PyVersion(3, 2)) -> AuditResult:
+def audit(so: SharedObject, assume_minimum_abi3: PyVersion | None = None) -> AuditResult:
     # We might fail to retrieve a minimum abi3 baseline if our context
     # (the shared object or its containing wheel) isn't actually tagged
     # as abi3 compatible.
+    if assume_minimum_abi3 is None:
+        assume_minimum_abi3 = PyVersion(3, 2)
     baseline = so.abi3_version(assume_lowest=assume_minimum_abi3)
     if baseline is None:
         raise AuditError("failed to determine ABI version baseline: not abi3 tagged?")