fix name of argument in docstring and the docs (closes #25076)

Patch by TAKASE Arihiro.
diff --git a/Doc/distutils/apiref.rst b/Doc/distutils/apiref.rst
index 8366d8a..92803b1 100644
--- a/Doc/distutils/apiref.rst
+++ b/Doc/distutils/apiref.rst
@@ -516,7 +516,7 @@
 
    .. method:: CCompiler.library_option(lib)
 
-      Return the compiler option to add *dir* to the list of libraries linked into the
+      Return the compiler option to add *lib* to the list of libraries linked into the
       shared library or executable.
 
 
diff --git a/Lib/distutils/ccompiler.py b/Lib/distutils/ccompiler.py
index 4907a0a..c0c446f 100644
--- a/Lib/distutils/ccompiler.py
+++ b/Lib/distutils/ccompiler.py
@@ -718,7 +718,7 @@
         raise NotImplementedError
 
     def library_option(self, lib):
-        """Return the compiler option to add 'dir' to the list of libraries
+        """Return the compiler option to add 'lib' to the list of libraries
         linked into the shared library or executable.
         """
         raise NotImplementedError