Change formatting of rosdep.

Use monospace formatting when referring to the `rosdep` command /
executable name and simply 'rosdep' when referring to the project.

The preferred capitalization of rosdep is rosdep not Rosdep or ROSdep
(and certainly not ROSDep).

doc/pip_and_pep_668.rst

@@ -3,7 +3,7 @@ Pip installation after PEP 668
 
 `PEP-668`_ introduced `externally managed environments <externally-managed-environments>`_ to Python packaging.
 
-``rosdep`` is designed to use pip as an alternative system package manager, rosdep installation of pip packages requires installing packages globally as root.
+rosdep is designed to use pip as an alternative system package manager, rosdep installation of pip packages requires installing packages globally as root.
 Starting with Python 3.11, `PEP-668`_ compliance requires you to allow pip to install alongside externally managed packages using the ``break-system-packages`` option.
 
 There are multiple ways to configure pip so that rosdep will succeed.
@@ -18,7 +18,7 @@ Setting environment variables in your login profile, ``PIP_BREAK_SYSTEM_PACKAGES
 The value of the environment variable can be any of ``1``, ``yes``, or ``true``.
 The string values are not case sensitive.
 
-``rosdep`` is designed to use ``sudo`` in order to gain root privileges for installation when not run as root.
+rosdep is designed to use ``sudo`` in order to gain root privileges for installation when not run as root.
 If your system's sudo configuration prohibits the passing of environment variables
 
 
@@ -44,15 +44,15 @@ Configuring for CI setup
 
 Either environment variables or configuration files can be used with your CI system.
 Which one you choose will depend on how your CI environment is configured.
-Perhaps the most straightforward will be to set the environent variable in the shell or script execution context before invoking rosdep.
+Perhaps the most straightforward will be to set the environent variable in the shell or script execution context before invoking ``rosdep``.
 
 .. code-block:: bash
 
    sudo rosdep init
    rosdep update
    PIP_BREAK_SYSTEM_PACKAGES=1 rosdep install -r rolling --from-paths src/
 
-If rosdep is invoked by internal processes in your CI and you need to set the configuration without having direct control over how ``rosdep install`` is run, setting the environment variable globally would also work.
+If ``rosdep`` is invoked by internal processes in your CI and you need to set the configuration without having direct control over how ``rosdep install`` is run, setting the environment variable globally would also work.
 
 .. code-block:: bash