Fix improper property use causing invalid dependency POM (#2854)

The archivesName property of BasePluginExtension is a Property<String>.
The default implementation of toString() for a Property is to print out
their name and owning object, and not the toString() of their contents.

This meant that passing archivesName to Node#appendNode as a value,
which calls toString() on it to make it into a String, results in e.g.
`extension 'base' property 'archivesName'` instead of the expected
value of e.g. `jei-1.19-common-api`.

The simple fix is to call Property#get() on archivesName to get its
actual value and pass that on as the node value.

FabricApi/build.gradle.kts

@@ -103,7 +103,7 @@ publishing {
                 dependencyProjects.forEach {
                     val dependencyNode = dependenciesNode.appendNode("dependency")
                     dependencyNode.appendNode("groupId", it.group)
-                    dependencyNode.appendNode("artifactId", it.base.archivesName)
+                    dependencyNode.appendNode("artifactId", it.base.archivesName.get())
                     dependencyNode.appendNode("version", it.version)
                 }
             }

Forge/build.gradle.kts

@@ -186,7 +186,7 @@ publishing {
 				dependencyProjects.forEach {
 					val dependencyNode = dependenciesNode.appendNode("dependency")
 					dependencyNode.appendNode("groupId", it.group)
-					dependencyNode.appendNode("artifactId", it.base.archivesName)
+					dependencyNode.appendNode("artifactId", it.base.archivesName.get())
 					dependencyNode.appendNode("version", it.version)
 				}
 			}

ForgeApi/build.gradle.kts

@@ -92,7 +92,7 @@ publishing {
 				dependencyProjects.forEach {
 					val dependencyNode = dependenciesNode.appendNode("dependency")
 					dependencyNode.appendNode("groupId", it.group)
-					dependencyNode.appendNode("artifactId", it.base.archivesName)
+					dependencyNode.appendNode("artifactId", it.base.archivesName.get())
 					dependencyNode.appendNode("version", it.version)
 				}
 			}