docs(lemonade): use Launchpad PPA for Linux install + fix v10.2.0 navbar label #175

Job	Run time
C++ Integration Tests (STX)	11m 30s
C++ (windows-latest)	13m 3s
C++ Install Test (windows-latest)	12m 59s
C++ (ubuntu-latest)	3m 25s
C++ Install Test (ubuntu-latest)	3m 2s
C++ Shared Library (windows-latest)	12m 23s
C++ Shared Library (ubuntu-latest)	3m 4s
C++ Benchmarks / C++ Benchmarks (windows-latest)	14m 51s
C++ Benchmarks / C++ Benchmarks (ubuntu-latest)	3m 57s
C++ Build Summary	2s
C++ Benchmarks / C++ Benchmarks (windows-latest)	14m 31s
C++ (ubuntu-latest)	3m 25s
C++ (windows-latest)	13m 3s
C++ Benchmarks / C++ Benchmarks (ubuntu-latest)	3m 57s
C++ Shared Library (windows-latest)	12m 23s
C++ Install Test (ubuntu-latest)	3m 2s
C++ Install Test (windows-latest)	12m 59s
C++ Shared Library (ubuntu-latest)	3m 4s
C++ Integration Tests (STX)	11m 30s
C++ Build Summary	4s
C++ Shared Library (ubuntu-latest)	3m 4s
C++ Benchmarks / C++ Benchmarks (windows-latest)	15m 10s
C++ (ubuntu-latest)	3m 25s
C++ Install Test (ubuntu-latest)	3m 2s
C++ Integration Tests (STX)	11m 30s
C++ Benchmarks / C++ Benchmarks (ubuntu-latest)	3m 57s
C++ Install Test (windows-latest)	12m 59s
C++ (windows-latest)	13m 3s
C++ Shared Library (windows-latest)	12m 23s
C++ Build Summary	4s
	3h 54m 51s

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