Remove the -rs suffix of jid, minidom and xmpp

We know those are Rust libraries, no need to add it to the path.  This
synchronises their directory with the crate name, hopefully reducing
confusion.

Cargo.toml

@@ -1,15 +1,15 @@
 [workspace]
 members = [  # alphabetically sorted
-  "jid-rs",
+  "jid",
-  "minidom-rs",
+  "minidom",
   "tokio-xmpp",
   "xmpp-parsers",
-  "xmpp-rs",
+  "xmpp",
 ]
 
 [patch.crates-io]
-jid = { path = "jid-rs" }
+jid = { path = "jid" }
-minidom = { path = "minidom-rs" }
+minidom = { path = "minidom" }
 tokio-xmpp = { path = "tokio-xmpp" }
 xmpp-parsers = { path = "xmpp-parsers" }
-xmpp = { path = "xmpp-rs" }
+xmpp = { path = "xmpp" }