Fix mistakes and typos in README

A few small mistakes I noticed while briefly reading the README

README.rst

@@ -22,7 +22,7 @@ To install, for example, the ``foss2022a-serial`` toolchain:
 
 1. Install this mpsd-software-manager Python package. The recommended way is to
    use ``pipx`` to that this tool is available independent from the use of any
-   other python environments::
+   other Python environments::
 
      $ pipx install git+https://gitlab.gwdg.de/mpsd-cs/mpsd-software-manager
 
@@ -100,7 +100,7 @@ Package sets and toolchains
       - openblas@0.3.20
 
   - in addition to the Easybuild-driven choice of packages, there are
-    additional packages included in each package which support the build of
+    additional packages included in each toolchain which support the build of
     Octopus within these toolchains. For ``foss2022a-serial`` these packages
     include::
 
@@ -151,7 +151,7 @@ Prerequisites
 
 What needs to be installed for the installation to succeed?
 
-The ``mpsd-software-manager`` python package.
+The ``mpsd-software-manager`` Python package.
 
 - This needs a recent Python (3.9 or later).
 - Install via pip or pipx.
@@ -180,7 +180,7 @@ Requirements for particular toolchains and package sets
 Finding the Octopus configure wrapper
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-For each Octopus toolchain, there is a Octopus configure wrapper available.
+For each Octopus toolchain, there is an Octopus configure wrapper available.
 The wrapper essentially calls the configure script with the right parameters,
 and library locations for the current toolchain. Once the
 toolchain is loaded, the variable ``$MPSD_OCTOPUS_CONFIGURE`` contains that
@@ -211,17 +211,17 @@ Octopus) using the ``foss2022a-serial`` toolchain.
 Frequently asked questions
 --------------------------
 
-- Can I install the ``mpsd-software-manager`` package in a python virtual environment?
+- Can I install the ``mpsd-software-manager`` package in a Python virtual environment?
 
   Yes. ``pipx`` is probably more convenient, but you can create your own Pyton
   virtual environment and install the ``mpsd-software-manager`` in that as a
-  regular python package::
+  regular Python package::
 
     python3 -m venv venv
     . venv/bin/activate
     pip install git+https://gitlab.gwdg.de/mpsd-cs/mpsd-software-manager
 
-  You just need to activate that python virtual environment before being able to
+  You just need to activate that Python virtual environment before being able to
   use the tool.
 
 - Does the command write anything outside the mpsd-software-root directory?
@@ -239,9 +239,10 @@ Frequently asked questions
 - How long does the compilation take?
 
   This depends on the hardware. A few hours are typical per toolchain. If a
-  second toolchain is compiled in the same MPSD software instance is likely to
-  be faster, in particular if the same compiler is used (and thus the compiler
-  does not need to be re-compiled for the second toolchain).
+  second toolchain is compiled in the same MPSD software instance and the same
+  MPSD release it is likely to be faster, in particular if the same compiler is
+  used (and thus the compiler does not need to be re-compiled for the second
+  toolchain).
 
 - How much disk storage do I need?