updated ios version to 1.2.6

Author: jwoo-msft

source/ios/AdaptiveCards/AdaptiveCards/AdaptiveCards/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.2.4</string>
+	<string>1.2.6</string>
 	<key>CFBundleVersion</key>
 	<string>$(CURRENT_PROJECT_VERSION)</string>
 	<key>NSPrincipalClass</key>