Fix typos in gradle.properties (Kotlin#2211)

Author: LouisCAD

gradle.properties

@@ -47,10 +47,10 @@ jsdom_global_version=3.0.2
 kotlin.incremental.multiplatform=true
 kotlin.native.ignoreDisabledTargets=true
 
-# Site deneration
+# Site generation
 jekyll_version=4.0
 
-# JS IR baceknd sometimes crashes with out-of-memory
+# JS IR backend sometimes crashes with out-of-memory
 # TODO: Remove once KT-37187 is fixed
 org.gradle.jvmargs=-Xmx2g