Add G1OJS_Tiny_Si5351_CLK0 to Arduino Library Manager (#6458)

* Add G1OJS_Tiny_Si5351_CLK0 to Arduino Library Manager

* Fix: add final newline to repositories.txt

Author: G1OJS

repositories.txt

@@ -8130,3 +8130,4 @@ https://github.com/regimantas/ChaCha32Arduino
 https://github.com/regimantas/PY32LowPower
 https://github.com/bahr1k/esp-arduino-tunnel
 https://github.com/llcesselx/lcd595
+https://github.com/G1OJS/G1OJS_Tiny_Si5351_CLK0