Edit command for adding a remote

CONTRIBUTING.md

@@ -30,7 +30,7 @@ To set up an environment to start developing on conda code, we recommend the fol
        GITHUB_USERNAME=kalefranz
        git clone [email protected]:$GITHUB_USERNAME/conda "$CONDA_PROJECT_ROOT"
        cd "$CONDA_PROJECT_ROOT"
-       git remote --add upstream [email protected]:conda/conda
+       git remote add upstream [email protected]:conda/conda
 
 2. Create a local development environment, and activate that environment
 
@@ -70,7 +70,7 @@ In these steps, we assume `git` is installed and available on `PATH`.
        set GITHUB_USERNAME=kalefranz
        git clone [email protected]:conda/conda "%CONDA_PROJECT_ROOT%"
        cd "%CONDA_PROJECT_ROOT%"
-       git remote --add %GITHUB_USERNAME% [email protected]:%GITHUB_USERNAME%/conda
+       git remote add %GITHUB_USERNAME% [email protected]:%GITHUB_USERNAME%/conda
 
    To be sure that the conda code being interpreted is the code in the project directory,
    look at the value of `conda location:` in the output of `conda info --all`.