fix broken maven link (snowflakedb#1081)

Co-authored-by: ilesh garish <[email protected]>

Author: zspitzer

README.rst

@@ -8,7 +8,7 @@ Snowflake JDBC Driver
     :target: http://www.apache.org/licenses/LICENSE-2.0.txt
 
 .. image:: https://maven-badges.herokuapp.com/maven-central/net.snowflake/snowflake-jdbc/badge.svg?style=plastic
-    :target: http://repo2.maven.org/maven2/net/snowflake/snowflake-jdbc/
+    :target: https://repo1.maven.org/maven2/net/snowflake/snowflake-jdbc/
 
 Snowflake provides a JDBC type 4 driver that supports core functionality, allowing Java program to connect to Snowflake.