Replace deprecated URL constructor

See https://inside.java/2023/02/15/quality-heads-up/

Change-Id: I30fb4ff50c73c880045bb9b631d51c22109e3c46

src/main/java/com/googlesource/gerrit/plugins/manager/gson/SmartGson.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/manager/gson/SmartGson.java b/src/main/java/com/googlesource/gerrit/plugins/manager/gson/SmartGson.java
index ae339de..21b1ddf 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/manager/gson/SmartGson.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/manager/gson/SmartGson.java
@@ -23,6 +23,7 @@
 import java.io.InputStreamReader;
 import java.io.Reader;
 import java.net.MalformedURLException;
+import java.net.URI;
 import java.net.URL;
 
 public class SmartGson {
@@ -50,7 +51,7 @@
   private InputStreamReader getReader(String url) throws IOException {
     URL ciUrl;
     try {
-      ciUrl = new URL(url);
+      ciUrl = URI.create(url).toURL();
     } catch (MalformedURLException e) {
       throw new IllegalArgumentException("Internal error: Gerrit CI URL seems to be malformed", e);
     }

src/main/java/com/googlesource/gerrit/plugins/manager/repository/JenkinsCiPluginsRepository.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/manager/repository/JenkinsCiPluginsRepository.java b/src/main/java/com/googlesource/gerrit/plugins/manager/repository/JenkinsCiPluginsRepository.java
index 0cfffa1..192bbe5 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/manager/repository/JenkinsCiPluginsRepository.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/manager/repository/JenkinsCiPluginsRepository.java
@@ -30,7 +30,7 @@
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStreamReader;
-import java.net.URL;
+import java.net.URI;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
@@ -224,7 +224,7 @@
               buildExecution.getString("url"), verArtifactJson.get().getString("relativePath"));
       try (BufferedReader reader =
           new BufferedReader(
-              new InputStreamReader(new URL(versionUrl).openStream(), UTF_8), 4096)) {
+              new InputStreamReader(URI.create(versionUrl).toURL().openStream(), UTF_8), 4096)) {
         String line;
         while ((line = reader.readLine()) != null) {
           if (artifactBody.length() > 0) {