Update max example defaults in README

Author: honno

README.md

@@ -254,7 +254,7 @@ jobs:
 > There are several ways to avoid this problem:
 >
 > - Increase the maximum number of examples, e.g., by adding `--max-examples
->   200` to the test command (the default is `100`, see below). This will
+>   200` to the test command (the default is `20`, see below). This will
 >   make it more likely that the failing case will be found, but it will also
 >   make the tests take longer to run.
 > - Don't use `-o xfail_strict=True`. This will make it so that if an XFAIL
@@ -275,7 +275,7 @@ jobs:
 The tests make heavy use
 [Hypothesis](https://hypothesis.readthedocs.io/en/latest/). You can configure
 how many examples are generated using the `--max-examples` flag, which
-defaults to `100`. Lower values can be useful for quick checks, and larger
+defaults to `20`. Lower values can be useful for quick checks, and larger
 values should result in more rigorous runs. For example, `--max-examples
 10_000` may find bugs where default runs don't but will take much longer to
 run.