Added the link to the PAJ7620 Gesture Sensor (#5722)

Author: apaex

content/guides/diy.md

@@ -103,6 +103,7 @@ unless it's truly exceptional, etc.
 - [Novy Pureline Pro extractor hood](https://github.com/bwynants/purelinepro) by [bwynants](https://github.com/bwynants)
 - [Digoo DG-R8H and similar nexus433 sensors to MQTT component](https://github.com/FreeBear-nc/esphome-nexus433) by {{< ghuser name="FreeBear-nc" >}}
 - [Adaptive Lighting for white/warm lights](https://github.com/mdvorak/esphome-adaptive-lighting) by {{< ghuser name="mdvorak" >}}
+- [Connecting the PAJ7620 gesture sensor](https://github.com/apaex/PAJ7620-ESPHome) by {{< ghuser name="apaex" >}}
 
 ## Sample Configurations