Fix typo

Author: mrotteveel

CHANGES.md

@@ -8,7 +8,7 @@ Version History
   - switch to JUnit 5 and use the `@Testcontainers` and `@Container` annotations, 
   - stay on firebird-testcontainers-java 1.6.1 and org.testcontainers:jdbc 1.21.4, 
   - switch to using Testcontainers URLs instead of using `@Rule` or `@ClassRule`, or 
-  - write you own rule implementation to start and stop the container.
+  - write your own rule implementation to start and stop the container.
 - Removed self-referencing generic type parameter from `FirebirdContainer`. \
   You need to replace occurrences of `FirebirdContainer<?>` and `FirebirdContainer<>` with `FirebirdContainer`.
 - Removed deprecated no-arg constructor from `FirebirdContainer`