Describe the bug
Variable type writing error

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Java/src/main/java/com/thealgorithms/datastructures/trees'
2. Click on 'AVLSimple'
3. Scroll down to 'Line 85'
4. See error

Expected behavior
Modify variable “Strings” to “String”

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Device Specification

Additional context
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