Updated brotli to 1.1.0

[radarhere]

brotli 1.1.0 has been released - https://github.com/google/brotli/releases/tag/v1.1.0

[nulano]

This breaks loading freetype due to missing libbrotli dlls:

--- PIL CORE support ok, compiled for 10.1.0.dev0
--- TKINTER support ok, loaded 8.6
*** FREETYPE2 support not installed
--- LITTLECMS2 support ok, loaded 2.15
--- WEBP support ok, loaded 1.3.2
--- WEBP Transparency support ok
--- WEBPMUX support ok
--- WEBP Animation support ok
--- JPEG support ok, compiled for libjpeg-turbo 3.0.0
--- OPENJPEG (JPEG2000) support ok, loaded 2.5.0
--- ZLIB (PNG/ZIP) support ok, loaded 1.3
--- LIBTIFF support ok, loaded 4.5.1
*** RAQM (Bidirectional Text) support not installed
--- LIBIMAGEQUANT (Quantization method) support ok, loaded 2.16.0
*** XCB (X protocol) support not installed

See #7453 for a fix.