Replaced cent8 with el8 for beter support

SimpleInstall.sh

@@ -44,7 +44,7 @@ elif [[ "${dist}" == *"centos"* ]] && [[ "${dist_ver}" == *"8"* ]]; then
  PKGM="dnf"
  PKGI="${PKGM} install --setopt=install_weak_deps=False --best -y"
  PKGLIST="dnf"
- shortdist=cent8
+ shortdist=el8
 else
  echo "This os in not supported"
  exit

readme.md

@@ -20,7 +20,7 @@
 ### Run a single command based on OS
 Example: Centos 8  
 ```
-if [ "$shortdist" = "cent8" ]; then
+if [ "$shortdist" = "el8" ]; then
  echo "i run when Centos 8 is detected"
 fi 
 ```  
@@ -39,7 +39,7 @@ Example: run Command1 if Debian 10 is detected and run Command2 if Centos 8 is d
 ```
 if [ "$shortdist" = "deb10" ] ; then
  echo "Command1: i debian 10 is detected"
-elif [ "$shortdist" = "cent8" ]; then
+elif [ "$shortdist" = "el8" ]; then
  echo "Command2: i run when Centos 8 is detected"
 fi
 ```