[PATCH] docs: fix qemu incorrect tag

[huangy81]

From: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>

The last modification of the patchset may be 2 month before
merging dirtyrate implementation, it used the wrong tag, so
fix with 6.2.

Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
---
 qapi/migration.json | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/qapi/migration.json b/qapi/migration.json
index 87146ce..f0aefda 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -1740,7 +1740,7 @@
 #
 # @dirty-rate: dirty rate.
 #
-# Since: 6.1
+# Since: 6.2
 #
 ##
 { 'struct': 'DirtyRateVcpu',
@@ -1774,7 +1774,7 @@
 #
 # @dirty-bitmap: calculate dirtyrate by dirty bitmap.
 #
-# Since: 6.1
+# Since: 6.2
 #
 ##
 { 'enum': 'DirtyRateMeasureMode',
@@ -1796,13 +1796,13 @@
 # @calc-time: time in units of second for sample dirty pages
 #
 # @sample-pages: page count per GB for sample dirty pages
-#                the default value is 512 (since 6.1)
+#                the default value is 512 (since 6.2)
 #
 # @mode: mode containing method of calculate dirtyrate includes
-#        'page-sampling' and 'dirty-ring' (Since 6.1)
+#        'page-sampling' and 'dirty-ring' (Since 6.2)
 #
 # @vcpu-dirty-rate: dirtyrate for each vcpu if dirty-ring
-#                   mode specified (Since 6.1)
+#                   mode specified (Since 6.2)
 #
 # Since: 5.2
 #
-- 
1.8.3.1