change GNU V2 to GNU V3 in AboutView

Classes/AboutView.m

@@ -83,7 +83,7 @@ static UICompositeViewDescription *compositeDescription = nil;
 }
 
 - (IBAction)onLicenceTap {
-	NSString *url = @"https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html";
+	NSString *url = @"https://www.gnu.org/licenses/gpl-3.0.html";
 	if (![UIApplication.sharedApplication openURL:[NSURL URLWithString:url]]) {
 		LOGE(@"Failed to open %@, invalid URL", url);
 	}

Classes/Base.lproj/AboutView.xib

@@ -134,7 +134,7 @@
                                 <label opaque="NO" userInteractionEnabled="NO" tag="14" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="7" baselineAdjustment="alignBaselines" minimumScaleFactor="0.5" id="gVK-Xc-S59" userLabel="licenseLabel">
                                     <rect key="frame" x="-8" y="335" width="320" height="61"/>
                                     <autoresizingMask key="autoresizingMask" widthSizable="YES" flexibleMinY="YES" heightSizable="YES" flexibleMaxY="YES"/>
-                                    <string key="text">GNU General Public License V2
+                                    <string key="text">GNU General Public License V3
 © 2010-2019 Belledonne Communications</string>
                                     <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                     <color key="textColor" red="0.33333333333333331" green="0.33333333333333331" blue="0.33333333333333331" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>