Improve meek's description in the glossary
A translator [pointed](https://hosted.weblate.org/translate/tor/new-support-portal/en/?checksum=fc4ef87740ceea3f ) out (thanks @Himmel!): ``` "These [pluggable transports](#pluggable-transports) all make it look like you are browsing a major web site instead of using [Tor](#tor-network-core-tor)." Since Meek is one of the Pluggable Transports, I think this statement is not accurate as a description of Meek. https://support.torproject.org/glossary/#meek ``` I agree and think we can rephrase this bit better. cc @emmapeel
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