ci: update reasons for using 'native'

Just requiring pmbootstrap installed is no reason to run 'native', as
other tests show. Now the messages are also consistent.

Signed-off-by: Pablo Correa Gómez <pabloyoyoista@postmarketos.org>
Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7868>

.ci/commits.sh

@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 # Description: check pkgver/pkgrel bumps, amount of changed pkgs etc
 # Options: native
-# Use 'native' because it requires git commit history.
+# Use 'native' because it requires running pmbootstrap.
 # https://postmarketos.org/pmb-ci
 
 if [ "$(id -u)" = 0 ]; then

.ci/lib/build_changed_aports.sh

@@ -1,6 +1,7 @@
 #!/bin/sh -e
 # Description: build modified packages for this architecture
 # Options: native slow
+# Use 'native' because it requires running pmbootstrap.
 # https://postmarketos.org/pmb-ci
 
 if [ "$(id -u)" = 0 ]; then

.ci/pytest.sh

@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 # Description: lint with various python tests
 # Options: native
-# Use 'native' because it requires pmbootstrap.
+# Use 'native' because it requires running pmbootstrap.
 # https://postmarketos.org/pmb-ci
 
 if [ "$(id -u)" = 0 ]; then