update version number

Author: moold

README.md

@@ -1,13 +1,13 @@
-[![Downloads](https://img.shields.io/github/downloads/Nextomics/NextPolish/total?logo=github)](https://github.com/Nextomics/NextPolish/releases/download/v1.2.0/NextPolish.tgz)
+[![Downloads](https://img.shields.io/github/downloads/Nextomics/NextPolish/total?logo=github)](https://github.com/Nextomics/NextPolish/releases/download/v1.2.1/NextPolish.tgz)
 [![Release](https://img.shields.io/github/release/Nextomics/NextPolish.svg)](https://github.com/Nextomics/NextPolish/releases)
 [![Issues](https://img.shields.io/github/issues/Nextomics/NextPolish.svg)](https://github.com/Nextomics/NextPolish/issues)
 
 # NextPolish
 NextPolish is used to fix base errors (SNV/Indel) in the genome generated by noisy long reads, it can be used with short read data only or long read data only or a combination of both. It contains two core modules, and use a stepwise fashion to correct the error bases in reference genome. To correct the raw third-generation sequencing (TGS) long reads with approximately 15-10% sequencing errors, please use [NextDenovo](https://github.com/Nextomics/NextDenovo).
 
 * **DOWNLOAD**  
-click [here](https://github.com/Nextomics/NextPolish/releases/download/v1.2.0/NextPolish.tgz) or use the following command:  
-`wget https://github.com/Nextomics/NextPolish/releases/download/v1.2.0/NextPolish.tgz`  
+click [here](https://github.com/Nextomics/NextPolish/releases/download/v1.2.1/NextPolish.tgz) or use the following command:  
+`wget https://github.com/Nextomics/NextPolish/releases/download/v1.2.1/NextPolish.tgz`  
 
 * **REQUIREMENT**
 	* [Python](https://www.python.org/download/releases/) (Support python 2 and 3)
@@ -79,4 +79,4 @@ Hu, Jiang, et al. "NextPolish: a fast and efficient genome polishing tool for lo
 	9. RuntimeError: Could not find drmaa library.  Please specify its full path using the environment variable DRMAA_LIBRARY_PATH.   
 	Please setup the environment variable: DRMAA_LIBRARY_PATH, see [here](https://github.com/pygridtools/drmaa-python) for more details. 
 	10. OSError: /path/lib64/libc.so.6: version `GLIBC_2.14' not found (required by /path/NextPolish/lib/calgs.so).  
-	Please download [this version](https://github.com/Nextomics/NextPolish/releases/download/v1.2.0/NextPolish-CentOS6.9.tgz) and try again.
+	Please download [this version](https://github.com/Nextomics/NextPolish/releases/download/v1.2.1/NextPolish-CentOS6.9.tgz) and try again.