Update requirements.txt (#11294)

* Update requirements.txt

Signed-off-by: whx-s <127172288+whx-s@users.noreply.github.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Signed-off-by: whx-s <127172288+whx-s@users.noreply.github.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

requirements.txt

@@ -3,7 +3,7 @@
 
 # Base ------------------------------------------------------------------------
 gitpython>=3.1.30
-matplotlib>=3.2.2
+matplotlib>=3.3
 numpy>=1.18.5
 opencv-python>=4.1.1
 Pillow>=7.1.2