docs: grammar fixes to qmp-events

When converting to qmp events, commits 7cfadb6b and a6330785
fixed some grammar as part of moving text between files.  But
since dfab4892 later restored this file to the state prior to
qmp events, we have to do it again.

* docs/qmp/qmp-events.txt (RESET, SPICE_INITIALIZED): Tweak.
Signed-off-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
Reviewed-by: NWenchao Xia <wenchaoqemu@gmail.com>
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>

docs/qmp/qmp-events.txt

@@ -285,7 +285,7 @@ Example:
 RESET
 -----
 
-Emitted when the Virtual Machine is reseted.
+Emitted when the Virtual Machine is reset.
 
 Data: None.
 
@@ -366,7 +366,7 @@ SPICE_INITIALIZED
 -----------------
 
 Emitted after initial handshake and authentication takes place (if any)
-and the SPICE channel is up'n'running
+and the SPICE channel is up and running
 
 Data: