doc: sort entries in doc/README.md#Miscellaneous alphabetically

Author: vasild

doc/README.md

@@ -77,12 +77,12 @@ The Bitcoin repo's [root README](/README.md) contains relevant information on th
 - [Files](files.md)
 - [Fuzz-testing](fuzzing.md)
 - [I2P Support](i2p.md)
+- [Init Scripts (systemd/upstart/openrc)](init.md)
+- [PSBT support](psbt.md)
 - [Reduce Memory](reduce-memory.md)
 - [Reduce Traffic](reduce-traffic.md)
 - [Tor Support](tor.md)
-- [Init Scripts (systemd/upstart/openrc)](init.md)
 - [ZMQ](zmq.md)
-- [PSBT support](psbt.md)
 
 License
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