Update SecurityExploits/Chrome/v8/CVE-2021-30623/README.md

Co-authored-by: intrigus-lgtm <60750685+intrigus-lgtm@users.noreply.github.com>

Author: xcorail

SecurityExploits/Chrome/v8/CVE-2021-30623/README.md

@@ -58,4 +58,4 @@ function writeShellCode(rwxAddr, shellArr) {
 var elementsAddr = ftoi32(addrs[1])[0];             //<------- change this to var elementsAddr = ftoi32(addrs[1])[1];
 ```
 
-This, however, does not affect the reliability of the exploit as the offsets are stable as long as the file is fixed, but it may cause issues the poc is modified. I do not know what causes this, but the exploit can probably be made more robust against this by matching pattern in memory instead of relying on fixed offsets.
+This, however, does not affect the reliability of the exploit as the offsets are stable as long as the file is fixed, but it may cause issues if the poc is modified. I do not know what causes this, but the exploit can probably be made more robust against this by matching patterns in memory instead of relying on fixed offsets.