Bump annotations from 20.1.0 to 21.0.1 in /modules/nginx

Bumps [annotations](https://github.com/JetBrains/java-annotations) from 20.1.0 to 21.0.1.
- [Release notes](https://github.com/JetBrains/java-annotations/releases)
- [Changelog](https://github.com/JetBrains/java-annotations/blob/master/CHANGELOG.md)
- [Commits](JetBrains/java-annotations@20.1.0...21.0.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

modules/nginx/build.gradle

@@ -2,6 +2,6 @@ description = "Testcontainers :: Nginx"
 
 dependencies {
     compile project(':testcontainers')
-    compileOnly 'org.jetbrains:annotations:20.1.0'
+    compileOnly 'org.jetbrains:annotations:21.0.1'
     testCompile 'org.rnorth.visible-assertions:visible-assertions:2.1.2'
 }