DOC: fix spelling

Author: David-dmh

doc/source/development/env_outside_docker.rst

@@ -82,7 +82,7 @@ installed (or you wish to install a newer version) you can install a compiler
     # for Red Had/RHEL/CentOS/Fedora
     yum groupinstall "Development Tools"
 
-For other Linux distributions, consult your favourite search engine for
+For other Linux distributions, consult your favorite search engine for
 compiler installation instructions.
 
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