small doc changes

Author: malkia

README.md

@@ -1,6 +1,6 @@
 # OpenTelemetry C++
 
-NOTE: _(This experimental branch tries to provide a Windows .dll version the docs for it are here [dll.md](dll.md))_
+NOTE: _(This experimental branch tries to provide a Windows, Linux and OSS .dll versions the docs for it are here [dll.md](dll.md))_
 
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