RELNOTES.md, OKEGui/OKEGui/Properties/AssemblyInfo.cs: bump version to 7.2.7

Signed-off-by: akarin <i@akarin.info>

Author: AkarinVS

OKEGui/OKEGui/Properties/AssemblyInfo.cs

@@ -47,4 +47,4 @@
 //可以指定所有这些值，也可以使用“生成号”和“修订号”的默认值，
 // 方法是按如下所示使用“*”: :
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("7.2.6.*")]
+[assembly: AssemblyVersion("7.2.7.*")]

RELNOTES.md

@@ -1,3 +1,9 @@
+# v7.2.7 "The Protagonist Returns", again^4!
+
+- Show vspipe path in window title.
+- Add support for "Optional" field in AudioTracks and SubtitleTracks. All optionals tracks of the same type must satisfy that either all exist or none exists.
+- The window title is still "The Protagonist Returns".
+
 # v7.2.6 "The Protagonist Returns", again^3!
 
 - Strip configurable set of common path components (e.g. BDMV STREAM) in working & output directory path.