Update git submodules

* Update plugins/plugin-manager from branch 'master'
  to 00e57948f4f112c226028bc5c8d8fe60f770038f
  - Fix loading of core plugins on Windows
    
    [2020-06-07T13:26:26.841+0300] [plugin-manager-preloader] ERROR com.googlesource.gerrit.plugins.manager.repository.CorePluginsRepository : Invalid plugin filename
    java.net.URISyntaxException: Illegal character in opaque part at index 11: Jar:file:c:\Projects\gerrit\bin\gerrit.war!/WEB-INF/plugins/gitiles.jar
    	at java.base/java.net.URI$Parser.fail(URI.java:2915)
    	at java.base/java.net.URI$Parser.checkChars(URI.java:3086)
    	at java.base/java.net.URI$Parser.parse(URI.java:3122)
    	at java.base/java.net.URI.<init>(URI.java:600)
    	at com.googlesource.gerrit.plugins.manager.repository.CorePluginsRepository.extractPluginInfoFromJarEntry(CorePluginsRepository.java:59)
    
    Bug: Issue 12885
    Change-Id: Icade084c2c156ca3caa1bffd9ae6dcde61a43c3e
    
diff --git a/plugins/plugin-manager b/plugins/plugin-manager
index d6a3381..00e5794 160000
--- a/plugins/plugin-manager
+++ b/plugins/plugin-manager
@@ -1 +1 @@
-Subproject commit d6a33818440eb20aca64a761f79652525b3eb060
+Subproject commit 00e57948f4f112c226028bc5c8d8fe60f770038f