fix: fix typo in git command in INSTALL.md

Author: zugz

INSTALL.md

@@ -83,7 +83,7 @@ Useful for generating Tox profiles from the output of the vanity key generators,
 Library dependencies are listed in the [components](#components) table. The dependencies need to be satisfied for the components to be built. Note that if you don't have a dependency for some component, e.g. you don't have `libopus` installed required for building `toxav` component, building of that component is silently disabled.
 
 
-Be advised that due to the addition of `cmp` as a submodule, you now also need to initialize the git submodules required by toxcore. This can be done by cloning the repo with the addition of `--recurse-submodules` or by running `git submodules update --init` in the root directory of the repo. 
+Be advised that due to the addition of `cmp` as a submodule, you now also need to initialize the git submodules required by toxcore. This can be done by cloning the repo with the addition of `--recurse-submodules` or by running `git submodule update --init` in the root directory of the repo. 
 
 #### Compiler requirements