Bump up the version to 1.34.0-unstable (#9124)

Co-authored-by: kamilchodola <[email protected]>

Author: core-repository-dispatch-app[bot]

src/Nethermind/Directory.Build.props

@@ -5,7 +5,7 @@
   <PropertyGroup Label="ProductInfo">
     <BuildTimestamp Condition="'$(BuildTimestamp)' == ''">$([System.DateTimeOffset]::UtcNow.ToUnixTimeSeconds())</BuildTimestamp>
     <SourceRevisionId Condition="'$(Commit)' != ''">$(Commit)</SourceRevisionId>
-    <VersionPrefix>1.33.0</VersionPrefix>
+    <VersionPrefix>1.34.0</VersionPrefix>
     <VersionSuffix>unstable</VersionSuffix>
   </PropertyGroup>