Update XRT_installation_instructions.md (#493)

Author: amsharifian

SDAccel/docs/XRT_installation_instructions.md

@@ -42,7 +42,7 @@ sudo yum reinstall xrt_*.rpm -y
 
 ```bash
 curl -s https://aws-fpga-developer-ami.s3.amazonaws.com/1.7.0/Patches/XRT_2019_1_RC2/xrt_201910.2.2.0_7.6.1810-xrt.rpm -o xrt.rpm
-curl -s https://aws-fpga-developer-ami.s3.amazonaws.com/1.7.0/Patches/XRT_2019_1_RC2/xrt_201910.2.2.0_7.6.1810-aws.rpm-o xrt-aws.rpm
+curl -s https://aws-fpga-developer-ami.s3.amazonaws.com/1.7.0/Patches/XRT_2019_1_RC2/xrt_201910.2.2.0_7.6.1810-aws.rpm -o xrt-aws.rpm
 sudo yum reinstall xrt*.rpm -y
 ```
 ### 2018.3
@@ -58,4 +58,4 @@ sudo yum reinstall xrt*.rpm -y
 curl -s https://aws-fpga-developer-ami.s3.amazonaws.com/1.5.0/Patches/XRT_2018_2_XDF_RC5/xrt_201802.2.1.0_7.5.1804-xrt.rpm -o xrt.rpm
 curl -s https://aws-fpga-developer-ami.s3.amazonaws.com/1.5.0/Patches/XRT_2018_2_XDF_RC5/xrt_201802.2.1.0_7.5.1804-aws.rpm -o xrt-aws.rpm
 sudo yum reinstall xrt*.rpm -y
-```
+```