Linux: update sockscan to add docstring to _find_file_ops_needles

volatility3/framework/plugins/linux/sockscan.py

@@ -151,6 +151,16 @@ class Sockscan(plugins.PluginInterface):
         return memory_layer_name
 
     def _find_file_ops_needles(self, kernel_module_name: str):
+        """Retrieves socket file symbols and the offset to the 'f_op' pointer.
+
+        Args:
+            kernel_module_name (str): The name of the kernel module to search.
+
+        Returns:
+            Tuple[List[int], int]: A list of file symbol addresses and,
+            the offset to the 'f_op' pointer.
+        """
+
         # get vmlinux module from context in order to read symbols
         vmlinux = self.context.modules[kernel_module_name]