scripts/requirements*.txt: pillow<10 to avoid warning

On July 1st, python library "Pillow" (needed by sphinxcontrib.blockdiag)
released version 10.0.0 https://pypi.org/project/Pillow/#history

The sof-docs build immediately started to fail with the warning
"'ImageDraw' object has no attribute 'textsize'"

Stick to pillow<10 for now to avoid the warning.

More details in issue
#472

Signed-off-by: Marc Herbert <marc.herbert@intel.com>

Author: marc-hb

scripts/requirements-lax.txt

@@ -58,3 +58,8 @@ sphinxcontrib.plantuml>=0.11,<0.25
 #  - Downgrade if successfully tested.
 #  - Test with plantum set to "none" in conf.py. We don't want small
 #    typo fixes to depend on UML diagrams.
+
+# Workaround for warning "'ImageDraw' object has no attribute 'textsize'"
+# with pillow 10.0.0, see
+# https://github.com/thesofproject/sof-docs/issues/472
+pillow<10

scripts/requirements.txt

@@ -6,3 +6,9 @@ docutils==0.17.1
 sphinx_rtd_theme
 sphinxcontrib-plantuml
 sphinxcontrib-blockdiag
+
+
+# Workaround for warning "'ImageDraw' object has no attribute 'textsize'"
+# with pillow 10.0.0, see
+# https://github.com/thesofproject/sof-docs/issues/472
+pillow<10