Netty verison bump

[mipo256]

When working on #2000 PR, I realized that the build on main is failing due to incompatibility of R2DBC driver and netty:

java.lang.NoClassDefFoundError: io/netty/resolver/dns/DnsNameResolverChannelStrategy
	at reactor.netty.transport.NameResolverProvider$Build.<clinit>(NameResolverProvider.java:682)
	at reactor.netty.transport.NameResolverProvider.builder(NameResolverProvider.java:303)
	at reactor.netty.tcp.TcpResources.<clinit>(TcpResources.java:426)
	at org.mariadb.r2dbc.MariadbConnectionConfiguration.<init>(MariadbConnectionConfiguration.java:142)
	at org.mariadb.r2dbc.MariadbConnectionConfiguration.<init>(MariadbConnectionConfiguration.java:32)
	at org.mariadb.r2dbc.MariadbConnectionConfiguration$Builder.build(MariadbConnectionConfiguration.java:651)
	at org.springframework.data.r2dbc.dialect.DialectResolverUnitTests.shouldResolveDatabaseType(DialectResolverUnitTests.java:41)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
Caused by: java.lang.ClassNotFoundException: io.netty.resolver.dns.DnsNameResolverChannelStrategy
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)

I've bumped the patch netty version to include the missing class. The version that project-reactor 1.2.3 that we're btw are using requires netty 4.1.118.Final

CC: @mp911de @schauder

[mipo256]

Hey @mp911de! This change seems to be very trivial, will you be able to take a look?