Fix message case in JetBundle.properties

Intention names should be lowercase, family names should have each word
except prepositions capitalized

idea/testData/quickfix/autoImports/noImportInSafeQualifiedExpressionNotFirst.before.Main.kt

@@ -2,7 +2,7 @@
 // ERROR: Unresolved reference: SomeTest
 // ACTION: Edit intention settings
 // ACTION: Replace safe access expression with 'if' expression
-// ACTION: Disable 'Replace Safe Access Expression With 'if' Expression'
+// ACTION: Disable 'Replace Safe Access Expression with 'if' Expression'
 
 package testing