README: fix portability information
Currently, it states that Motr can run on any version of Linux, which is not true.
Solution: fix the sentence by pointing out that Motr can be easily ported to any version of Linux.
@@ -37,7 +37,7 @@ Following are the features of CORTX Motr:
- Extension interface.
- Flexible transactions.
- Open source.
-- Portable: runs in user space on any version of Linux.
+- Portable: runs in user space and can be easily ported to any version of Linux.
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