chore: fix broken link for javadoc. (#1142)

Author: zhumin8

google-oauth-client-appengine/pom.xml

@@ -31,7 +31,7 @@
           <links>
             <link>https://download.oracle.com/javase/7/docs/api/</link>
             <link>https://cloud.google.com/appengine/docs/standard/java/javadoc/</link>
-            <link>https://googleapis.dev/java/google-http-client/${project.http.version}/</link>
+            <link>https://cloud.google.com/java/docs/reference/google-http-client/${project.http.version}/</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>

google-oauth-client-java6/pom.xml

@@ -16,7 +16,7 @@
         <configuration>
           <links>
             <link>http://download.oracle.com/javase/7/docs/api/</link>
-            <link>https://googleapis.dev/java/google-http-client/${project.http.version}/</link>
+            <link>https://cloud.google.com/java/docs/reference/google-http-client/${project.http.version}/</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>

google-oauth-client-jetty/pom.xml

@@ -18,7 +18,7 @@
         <configuration>
           <links>
             <link>http://download.oracle.com/javase/7/docs/api/</link>
-            <link>https://googleapis.dev/java/google-http-client/${project.http.version}/</link>
+            <link>https://cloud.google.com/java/docs/reference/google-http-client/${project.http.version}/</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>

google-oauth-client-servlet/pom.xml

@@ -17,7 +17,7 @@
           <links>
             <link>https://download.oracle.com/javase/7/docs/api/</link>
             <link>https://cloud.google.com/appengine/docs/standard/java/javadoc/</link>
-            <link>https://googleapis.dev/java/google-http-client/${project.http.version}/</link>
+            <link>https://cloud.google.com/java/docs/reference/google-http-client/${project.http.version}/</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>

google-oauth-client/pom.xml

@@ -21,7 +21,7 @@
         <configuration>
           <links>
             <link>http://download.oracle.com/javase/7/docs/api/</link>
-            <link>https://googleapis.dev/java/google-http-client/${project.http.version}/</link>
+            <link>https://cloud.google.com/java/docs/reference/google-http-client/${project.http.version}/</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>

pom.xml

@@ -333,7 +333,7 @@
               <links>
                 <link>https://docs.oracle.com/javase/7/docs/api/</link>
                 <link>https://cloud.google.com/appengine/docs/java/javadoc</link>
-                <link>https://googleapis.dev/java/google-http-client/${project.http.version}/</link>
+                <link>https://cloud.google.com/java/docs/reference/google-http-client/${project.http.version}/</link>
               </links>
               <doctitle>Google OAuth Client Library for Java ${project.version}</doctitle>
               <excludePackageNames>com.google.api.services</excludePackageNames>