Update README.md

Remove redundant line in table of contents

README.md

@@ -8,7 +8,6 @@ The following posts are in reverse chronological order: newest posts are first.
 |:-------|:-----|:------|
 | Differential | 2020-08-13 | [Lateral Joins and Demand-Driven Queries](https://github.com/frankmcsherry/blog/blob/master/posts/2020-08-13.md)
 | Differential | 2020-08-01 | [Change Data Capture (part 1)](https://github.com/frankmcsherry/blog/blob/master/posts/2020-08-01.md)
-| Differential | 2020-04-01 | [Change Data Capture (part 1)](https://github.com/frankmcsherry/blog/blob/master/posts/2020-08-01.md)
 | Materialize | 2020-04-01 | [Robust Reductions in Materialize](https://github.com/frankmcsherry/blog/blob/master/posts/2020-04-01.md)
 | Materialize | 2020-06-19 | [Eventual Consistency isn't for Streaming](https://github.com/frankmcsherry/blog/blob/master/posts/2020-06-19.md)
 | Timely,Differential | 2020-06-09 | [Rust for Data-Intensive Computation](https://github.com/frankmcsherry/blog/blob/master/posts/2020-06-09.md)
@@ -87,4 +86,4 @@ The following posts are in reverse chronological order: newest posts are first.
 | Timely | 2014-12-29 | [Timely dataflow: core concepts](https://github.com/frankmcsherry/blog/blob/master/posts/2014-12-29.md) |
 | Timely | 2014-12-27 | [Timely dataflow: reboot](https://github.com/frankmcsherry/blog/blob/master/posts/2014-12-27.md) |
 | Rust | 2014-12-16 | [Columnarization in Rust, part 2](https://github.com/frankmcsherry/blog/blob/master/posts/2014-12-16.md) |
-| Rust | 2014-12-15 | [Columnarization in Rust](https://github.com/frankmcsherry/blog/blob/master/posts/2014-12-15.md) |
+| Rust | 2014-12-15 | [Columnarization in Rust](https://github.com/frankmcsherry/blog/blob/master/posts/2014-12-15.md) |