Doc: Fix RST Syntax

Carefully fix RST Syntax in documentation, primarily for the
`parameters.rst` file and in particular for nested bullet lists.
Also fix other Sphinx warnings on the way.

docs/source/install/hpc/lumi.rst

@@ -191,7 +191,7 @@ Use the following :ref:`cmake commands <building-cmake>` to compile the applicat
          cmake --fresh -S . -B build_lumi_cpu_py -DImpactX_FFT=ON -DImpactX_PYTHON=ON
          cmake --build build_lumi_cpu_py -j 16 --target pip_install
 
-Now, you can :ref:`submit LUMI compute jobs <running-cpp-lumi>` for ImpactX :ref:`Python scripts <usage-picmi>` (:ref:`example scripts <usage-examples>`).
+Now, you can :ref:`submit LUMI compute jobs <running-cpp-lumi>` for ImpactX :ref:`Python scripts <usage_run-user-interface>` (:ref:`example scripts <usage-examples>`).
 Or, you can use the ImpactX executables to submit LUMI jobs (:ref:`example inputs <usage-examples>`).
 For executables, you can reference their location in your :ref:`job script <running-cpp-lumi>` or copy them to a location in ``/project/$proj`` or ``/scratch/$proj``.
 

docs/source/usage/how_to_run.rst

@@ -4,6 +4,8 @@ Run ImpactX
 ===========
 
 
+.. _usage_run-tracking-mode:
+
 How to select a tracking mode
 -----------------------------
 
@@ -20,6 +22,8 @@ Reference Tracking Early Design    Reference orbit No
 ================== =============== =============== ==================
 
 
+.. _usage_run-user-interface:
+
 How to select a user interface
 ------------------------------
 
@@ -40,6 +44,8 @@ Dashboard   Beginner          Learning, Control-Systems Yes         No
 =========== ================= ========================= =========== =========== ============== ===========
 
 
+.. _usage_run-user-interface-how:
+
 How to run
 ----------
 
@@ -66,6 +72,8 @@ After installing ImpactX, run :ref:`one of our examples <usage-examples>`, e.g.,
          impactx-dashboard
 
 
+.. _usage_run-computing-system:
+
 How to select a computing system
 --------------------------------
 
@@ -86,6 +94,6 @@ As a rough guidance, they are best used for:
 ======== ========================================================= ======= =================
 Hardware Resolution needs                                          AI/ML   Energy Efficiency
 ======== ========================================================= ======= =================
-CPUs     Small (<10M particles) runs and coarse collective effects Yes     Low
-GPUs     Many (>10M) particles and/or detailed collective effects  Fastest High
+CPUs     Small (<10M particles) runs and coarse collective effects Yes     Lower
+GPUs     Many (>10M) particles and/or detailed collective effects  Fastest Higher
 ======== ========================================================= ======= =================