Don't use md5 for computing the lockfile filename

md5 is forbidden in FIPS mode, rely on sha256 instead and set usedforsecurity to
False to avoid future issues

pytest_container/container.py

@@ -20,7 +20,7 @@
 from dataclasses import field
 from datetime import datetime
 from datetime import timedelta
-from hashlib import md5
+from hashlib import sha256
 from os.path import exists
 from os.path import isabs
 from os.path import join
@@ -619,7 +619,11 @@ def filelock_filename(self) -> str:
                 all_elements.append("".join(value.values()))
             else:
                 all_elements.append(str(value))
-        return f"{md5((''.join(all_elements)).encode()).hexdigest()}.lock"
+
+        obj_hash = sha256(
+            ("".join(all_elements)).encode(), usedforsecurity=False
+        ).hexdigest()
+        return f"{obj_hash}.lock"
 
 
 class ContainerBaseABC(ABC):