Update projects.yml (#828)

* Update projects.yml

Add `pillow-heif`

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

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docs/data/projects.yml

@@ -383,3 +383,10 @@
   ci: [github]
   os: [apple, windows]
   notes: Python `pybind11` binding to Telegram's WebRTC library with third party dependencies like `OpenSSL`, `MozJPEG`, `FFmpeg`, etc.
+
+- name: pillow-heif
+  gh: bigcat88/pillow_heif
+  pypi: pillow-heif
+  ci: [github]
+  os: [apple, linux]
+  notes: Python CFFI binding to libheif library with third party dependencies like `libde265`, `x265`, `libaom` with test & publishing on PyPi.