nuspec should use version as lower end so that prereleases can reference it (#4266)

Author: Mpdreamz

build/Elasticsearch.Net.VirtualizedCluster.nuspec

@@ -19,10 +19,10 @@
 		<repository type="git" url="https://github.com/elastic/elasticsearch-net.git" branch="$branch$" commit="$commit$" />
 		<dependencies>
 			<group targetFramework=".NETStandard2.0">
-				<dependency id="Elasticsearch.Net" version="[$currentMajorVersion$, $nextMajorVersion$)" />
+				<dependency id="Elasticsearch.Net" version="[$version$, $nextMajorVersion$)" />
 			</group>
 			<group targetFramework="net461">
-				<dependency id="Elasticsearch.Net" version="[$currentMajorVersion$, $nextMajorVersion$)" />
+				<dependency id="Elasticsearch.Net" version="[$version$, $nextMajorVersion$)" />
 			</group>
 		</dependencies>
 	</metadata>