Update tools-version for -user-module-version

[neonichu]

We are not shipping this in 5.9, so we need to tweak this.

[neonichu]

@swift-ci please smoke test

[ole]

@neonichu I noticed the tools version gate for this is still set to .vNext in the current main and release/5.10 branches:

swift-package-manager/Sources/Build/BuildDescription/SwiftTargetBuildDescription.swift

Lines 629 to 632 in 0d1f370

	// Pass `-user-module-version` for versioned packages that aren't pre-releases.
	if let version = package.manifest.version, version.prereleaseIdentifiers.isEmpty, version.buildMetadataIdentifiers.isEmpty, toolsVersion >= .vNext {
	args += ["-user-module-version", version.description]
	}

Is there anything blocking this from making it into Swift 5.10?

[MaxDesiatov]

I've changed it to 5.10 in #7261

[ole]

@MaxDesiatov Thanks!