Update README.algorithms

Author: Suxiaocai

README.algorithms

@@ -1,5 +1,5 @@
 README for GSQL Algorithm Library
-9/5/19
+9/12/19
 
 The GSQL Graph Algorithm Library is a collection of high-performance GSQL queries,
 each of which implements a standard graph algorithm. Each algorithm is ready to be
@@ -20,6 +20,11 @@ well-suited for graph algorithms:
   example, and they can develop and submit additions to the library.
 
 
+Compatibility Table
+-----------------
+v1.2 compatible with TG2.4 or higher
+v1.1 compatible with TG2.4 or higher
+
 Library Structure
 -----------------