Update the JDK required in the build instructions
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# Building Apache Commons Compress
-In order to build Commons Compress a JDK implementation 1.7 or higher
+In order to build Commons Compress a JDK implementation 8 or higher
and Apache Maven 3.x are required. **Note that Commons Compress
currently doesn't build on JDK 14+, we will address this before
releasing Compress 1.21**.
