TestManyLocators crashes due to dead URL

[stephengold]

Similar to #982, but this time caused by reorg of our wiki. Seen in v3.4.0-beta3:

May 08, 2021 2:16:30 PM com.jme3.asset.plugins.UrlLocator locate
WARNING: Error while locating Interface/Fonts/Default.fnt
java.io.IOException: Server returned HTTP response code: 403 for URL: http://wiki.jmonkeyengine.org/jme3/beginnerInterface/Fonts/Default.fnt
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1894)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
	at com.jme3.asset.plugins.UrlAssetInfo.create(UrlAssetInfo.java:58)
	at com.jme3.asset.plugins.UrlLocator.locate(UrlLocator.java:79)
	at com.jme3.asset.ImplHandler.tryLocate(ImplHandler.java:173)
	at com.jme3.asset.DesktopAssetManager.locateAsset(DesktopAssetManager.java:203)
	at jme3test.asset.TestManyLocators.main(TestManyLocators.java:59)

May 08, 2021 2:16:32 PM com.jme3.asset.plugins.UrlLocator locate
WARNING: Error while locating casaamarela.jpg
java.io.IOException: Server returned HTTP response code: 403 for URL: http://wiki.jmonkeyengine.org/jme3/beginnercasaamarela.jpg
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1894)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
	at com.jme3.asset.plugins.UrlAssetInfo.create(UrlAssetInfo.java:58)
	at com.jme3.asset.plugins.UrlLocator.locate(UrlLocator.java:79)
	at com.jme3.asset.ImplHandler.tryLocate(ImplHandler.java:173)
	at com.jme3.asset.DesktopAssetManager.locateAsset(DesktopAssetManager.java:203)
	at jme3test.asset.TestManyLocators.main(TestManyLocators.java:62)

May 08, 2021 2:16:32 PM com.jme3.asset.plugins.UrlLocator locate
WARNING: Error while locating glasstile2.png
java.io.IOException: Server returned HTTP response code: 403 for URL: http://wiki.jmonkeyengine.org/jme3/beginnerglasstile2.png
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1894)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
	at com.jme3.asset.plugins.UrlAssetInfo.create(UrlAssetInfo.java:58)
	at com.jme3.asset.plugins.UrlLocator.locate(UrlLocator.java:79)
	at com.jme3.asset.ImplHandler.tryLocate(ImplHandler.java:173)
	at com.jme3.asset.DesktopAssetManager.locateAsset(DesktopAssetManager.java:203)
	at jme3test.asset.TestManyLocators.main(TestManyLocators.java:65)

May 08, 2021 2:16:32 PM com.jme3.asset.plugins.UrlLocator locate
WARNING: Error while locating beginner-physics.png
java.io.IOException: Server returned HTTP response code: 403 for URL: http://wiki.jmonkeyengine.org/jme3/beginnerbeginner-physics.png
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1894)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
	at com.jme3.asset.plugins.UrlAssetInfo.create(UrlAssetInfo.java:58)
	at com.jme3.asset.plugins.UrlLocator.locate(UrlLocator.java:79)
	at com.jme3.asset.ImplHandler.tryLocate(ImplHandler.java:173)
	at com.jme3.asset.DesktopAssetManager.locateAsset(DesktopAssetManager.java:203)
	at jme3test.asset.TestManyLocators.main(TestManyLocators.java:68)

May 08, 2021 2:16:32 PM com.jme3.asset.DesktopAssetManager locateAsset
WARNING: Cannot locate resource: beginner-physics.png (Flipped)
Found classpath font: com.jme3.asset.plugins.UrlAssetInfo[key=Interface/Fonts/Default.fnt]
Found zip image: com.jme3.asset.plugins.ZipLocator$JarAssetInfo[key=casaamarela.jpg]
Found online zip image: com.jme3.asset.plugins.HttpZipLocator$1[key=glasstile2.png]
Failed to load from HTTP

Looks like an easy fix!