Fix typo in changenote

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

Author: nickrolfe

ruby/ql/lib/change-notes/2022-07-11-command-execution.md

@@ -1,6 +1,6 @@
 ---
 category: minorAnalysis
 ---
-* Fixed a bug causing every expression in the database to be a considered a system-command execution sink when calls to any of the following methods exist:
+* Fixed a bug causing every expression in the database to be considered a system-command execution sink when calls to any of the following methods exist:
   * The `spawn`, `fspawn`, `popen4`, `pspawn`, `system`, `_pspawn` methods and the backtick operator from the `POSIX::spawn` gem.
   * The `execute_command`, `rake`, `rails_command`, and `git` methods in `Rails::Generation::Actions`.