Typo (#1666)

Signed-off-by: yhmo <yihua.mo@zilliz.com>

README.md

@@ -22,7 +22,7 @@ The following table shows compatibilities between Milvus and Java SDK.
 |     2.3.x      |      2.3.11      |
 |     2.4.x      |      2.4.11      |
 |     2.5.x      |      2.5.14      |
-|     2.6.x      |      2.6.6       |
+|     2.6.x      |      2.6.7       |
 
 ### Install Java SDK