[PATCH 3/7] doc: make pdfdocs: Add pip install pytest to the list of needed steps

[Adriano Carvalho]

If I don't install pytest, this is what I get with docker.io/trini/u-boot-gitlab-ci-runner:jammy-20250714-25Jul2025:

uboot at 35c89b9ab70e:~/u-boot$ make pdfdocs
[...]
WARNING: autodoc: failed to import module 'test_bind'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
WARNING: autodoc: failed to import module 'test_bootmenu'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
WARNING: autodoc: failed to import module 'test_bootstage'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
WARNING: autodoc: failed to import module 'test_button'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
WARNING: autodoc: failed to import module 'test_efi_loader'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
WARNING: autodoc: failed to import module 'test_net'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
WARNING: autodoc: failed to import module 'test_net_boot'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
[...]
build finished with problems, 7 warnings (with warnings treated as errors).
make[1]: *** [doc/Makefile:84: latexdocs] Error 1
make: *** [Makefile:2686: pdfdocs] Error 2

NOTE: This won't completely fix the pdfdocs target. See next commit(s).

Signed-off-by: Adriano Carvalho <adrianocarvalho.pt at gmail.com>
---
 doc/build/documentation.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/build/documentation.rst b/doc/build/documentation.rst
index 2540f3973d2..69e0dc418b1 100644
--- a/doc/build/documentation.rst
+++ b/doc/build/documentation.rst
@@ -32,6 +32,7 @@ The *htmldocs* target is used to build the HTML documentation. It uses the
     . myenv/bin/activate
     # Install build requirements
     python3 -m pip install -r doc/sphinx/requirements.txt
+    python3 -m pip install pytest
     # Build the documentation
     make htmldocs
     # Deactivate the Python environment
-- 
2.48.1