Resetting sprint number and updating minor version (#8716)

Author: VpOfEngineering

build/common.props

@@ -4,7 +4,7 @@
     <TargetFramework>netstandard2.0</TargetFramework>
     <LangVersion>latest</LangVersion>
     <MajorVersion>3</MajorVersion>
-    <MinorVersion>14</MinorVersion>
+    <MinorVersion>15</MinorVersion>
     <PatchVersion>0</PatchVersion>
     <VersionPrefix>$(MajorVersion).$(MinorVersion).$(PatchVersion)</VersionPrefix>
     <Version Condition=" '$(BuildNumber)' != '' ">$(VersionPrefix)-$(BuildNumber)</Version>

release_notes.md

@@ -4,5 +4,5 @@
 -->
 - Worker concurrency memory check (https://github.com/Azure/azure-functions-host/issues/7499)
 
-**Release sprint:** Sprint 128
-[ [bugs](https://github.com/Azure/azure-functions-host/issues?q=is%3Aissue+milestone%3A%22Functions+Sprint+128%22+label%3Abug+is%3Aclosed) | [features](https://github.com/Azure/azure-functions-host/issues?q=is%3Aissue+milestone%3A%22Functions+Sprint+128%22+label%3Afeature+is%3Aclosed) ]
+**Release sprint:** Sprint 129
+[ [bugs](https://github.com/Azure/azure-functions-host/issues?q=is%3Aissue+milestone%3A%22Functions+Sprint+129%22+label%3Abug+is%3Aclosed) | [features](https://github.com/Azure/azure-functions-host/issues?q=is%3Aissue+milestone%3A%22Functions+Sprint+129%22+label%3Afeature+is%3Aclosed) ]