Bump org.mockito:mockito-core from 5.20.0 to 5.21.0 (#1782)

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -31,7 +31,7 @@ kspVersion = "2.3.3"
 legacySupportV13Version = "1.0.0"
 libsessionUtilAndroidVersion = "1.0.9-11-g1b8d453"
 media3ExoplayerVersion = "1.8.0"
-mockitoCoreVersion = "5.20.0"
+mockitoCoreVersion = "5.21.0"
 navVersion = "2.9.5"
 appcompatVersion = "1.7.1"
 coreVersion = "1.16.0"