Fix ref in nuspec

Author: josesimoes

devices/Relay4/Relay4.nuspec

@@ -20,7 +20,7 @@
     <tags>nanoFramework C# csharp netmf netnf iot relay m5stack</tags>
     <dependencies>
       <dependency id="nanoFramework.CoreLibrary" version="1.16.1" />
-      <dependency id="nanoFramework.System.Device.I2c" version="1.1.25" />
+      <dependency id="nanoFramework.System.Device.I2c" version="1.1.26" />
     </dependencies>
   </metadata>
   <files>