Minor documentation updates.

Co-authored-by: Daniele Nicolodi <daniele@grinta.net>

Author: freakboy3742

docs/reference/environment-variables.rst

@@ -71,7 +71,7 @@ Environment variables used by meson-python
    This variable must be set to a major/minor version (e.g., ``13.0`` or
    ``15.4``).
 
-   Note that ``IPHONEOS_DEPLOYMENT_TARGET`` is the *only* permitted mechanism
+   Note that ``IPHONEOS_DEPLOYMENT_TARGET`` is the only supported mechanism
    for specifying the target iOS version. Although the iOS toolchain supports
    the use of ``-mios-version-min`` compile and link flags to set the target iOS
    version, ``meson-python`` will not set the Python wheel platform tag
@@ -99,7 +99,7 @@ Environment variables used by meson-python
    are currently designed to specify compatibility only with major version
    number granularity.
 
-   Note that ``MACOSX_DEPLOYMENT_TARGET`` is the *only* permitted mechanism for
+   Note that ``MACOSX_DEPLOYMENT_TARGET`` is the only supported mechanism for
    specifying the target macOS version. Although the macOS toolchain supports
    the use of ``-mmacosx-version-min`` compile and link flags to set the target
    macOS version, ``meson-python`` will not set the Python wheel platform tag

docs/reference/meson-compatibility.rst

@@ -54,7 +54,7 @@ versions.
 
 .. option:: 1.9.0
 
-   Meson 1.9.0 or later is required to support building for ``iOS``.
+   Meson 1.9.0 or later is required to support building for iOS.
 
 Build front-ends by default build packages in an isolated Python
 environment where build dependencies are installed. Most often, unless