btrfs-progs: docs: add 6.17 kernel development statistics

[ci skip]

Signed-off-by: David Sterba <[email protected]>

Author: kdave

Documentation/Contributors.rst

@@ -61,6 +61,7 @@ Statistics for 6.x series
     "6.14", "20", "114592", "167178", "147", "+3847 -1391"
     "6.15", "25", "114616", "167485", "190", "+2346 -2039"
     "6.16", "16", "114997", "168152", "222", "+4143 -3464"
+    "6.17", "27", "115015", "168409", "255", "+3082 -2823"
 
 
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