Update changelog for 0.66.1-1pureos1 release

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Status Name Job ID Coverage
  Package
passed package-pureos-byzantium #376154
librem5

00:04:28

passed package-pureos-byzantium:arm64 #376155
librem5:arm64

00:21:45

 
  Test Package
passed autopkgtest-pureos-byzantium-package #376156
librem5

00:01:32

passed check-tarball #376158
librem5

00:00:41

passed lintian-pureos-byzantium-package #376157
librem5

00:00:37