Add 7SemiSHT4x_Library to Arduino Library Manager (#5668)

* Update repositories.txt

* Update repositories.txt

Author: 7Semi

repositories.txt

@@ -1,3 +1,4 @@
+https://github.com/7Semi/7SemiSHT4x_Library
 https://github.com/Moarbue/incremental-rotary-encoder
 https://github.com/Moarbue/arduino-button
 https://github.com/Moarbue/FIR-Filter
@@ -7645,3 +7646,4 @@ https://github.com/bsrahmat/iotNetESP32
 https://github.com/ajangrahmat/ArduMekaWiFi
 https://github.com/eis-interbot/EIS_INTERBOT
 https://github.com/lucaschoeneberg/lw09-dali
+