update readme

Author: hogan-tech

.github/test.txt

@@ -1 +1 @@
-3625-count-number-of-trapezoids-ii python hard
+2211-count-collisions-on-a-road python medium

2211-count-collisions-on-a-road/2211-count-collisions-on-a-road.py renamed to Python/2211-count-collisions-on-a-road.py

@@ -98,6 +98,7 @@
 | 2207 | [Maximize Number of Subsequences in a String](https://leetcode.com/problems/maximize-number-of-subsequences-in-a-string)                                                    | [Python](./Python/2207-maximize-number-of-subsequences-in-a-string.py)                          | [Medium](./Readme/2207-maximize-number-of-subsequences-in-a-string.md)                          |
 | 2208 | [Minimum Operations to Halve Array Sum](https://leetcode.com/problems/minimum-operations-to-halve-array-sum)                                                                | [Python](./Python/2208-minimum-operations-to-halve-array-sum.py)                                | [Medium](./Readme/2208-minimum-operations-to-halve-array-sum.md)                                |
 | 2210 | [Count Hills and Valleys in an Array](https://leetcode.com/problems/count-hills-and-valleys-in-an-array)                                                                    | [Python](./Python/2210-count-hills-and-valleys-in-an-array.py)                                  | [Easy](./Readme/2210-count-hills-and-valleys-in-an-array.md)                                    |
+| 2211 | [Count Collisions on a Road](https://leetcode.com/problems/count-collisions-on-a-road)                                                                                      | [Python](./Python/2211-count-collisions-on-a-road.py)                                           | [Medium](./Readme/2211-count-collisions-on-a-road.md)                                           |
 | 2214 | [Minimum Health to Beat Game](https://leetcode.com/problems/minimum-health-to-beat-game)                                                                                    | [Python](./Python/2214-minimum-health-to-beat-game.py)                                          | [Medium](./Readme/2214-minimum-health-to-beat-game.md)                                          |
 | 2215 | [Find the Difference of Two Arrays](https://leetcode.com/problems/find-the-difference-of-two-arrays/)                                                                       | [Python](./Python/2215-find-the-difference-of-two-arrays.py)                                    | [Easy](./Readme/2215-find-the-difference-of-two-arrays.md)                                      |
 | 2216 | [Minimum Deletions to Make Array Beautiful](https://leetcode.com/problems/minimum-deletions-to-make-array-beautiful)                                                        | [Python](./Python/2216-minimum-deletions-to-make-array-beautiful.py)                            | [Medium](./Readme/2216-minimum-deletions-to-make-array-beautiful.md)                            |