docs: Add SENTRY_TRANSPORT_COMPRESSION to the README (#976) #2

Job	Run time
Lint	17s
Xcode Build for iOS	1m 0s
Linux (old gcc, 32-bit)	1m 18s
Linux (new gcc)	6m 52s
Linux (clang + asan + llvm-cov)	8m 16s
Linux (clang + kcov)	25m 16s
Linux (gcc + code-checker + valgrind)	6m 16s
macOS (xcode llvm)	11m 6s
macOS (xcode llvm + universal)	20m 24s
macOS (clang + asan + llvm-cov)	18m 31s
Windows (old VS, 32-bit)	11m 1s
Windows (latest)	6h 0m 15s
LLVM-Mingw	13m 32s
Android (old API/NDK)	7m 5s
Android (new API/NDK)	5m 12s
Create Release Archive	0s
	8h 16m 21s

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