Fix the link to the Python wrapper.

Change-Id: I9fdb4ce637857acb6d7c9979a910bf35db99fa75
Reviewed-on: https://code-review.googlesource.com/c/re2/+/62870
Reviewed-by: Alex Chernyakhovsky <achernya@google.com>
Reviewed-by: Paul Wankadia <junyer@google.com>
diff --git a/README b/README
index 469d6f3..21a4358 100644
--- a/README
+++ b/README
@@ -32,7 +32,7 @@
 
 RE2's native language is C++.
 
-The Python wrapper is at https://github.com/google/re2/tree/abseil/python
+The Python wrapper is at https://github.com/google/re2/tree/main/python
 and on PyPI (https://pypi.org/project/google-re2/).
 
 A C wrapper is at https://github.com/marcomaggi/cre2/.