docs: fix invalid version tags

.github/workflows/docs/docs-digest.yml

@@ -1,4 +1,4 @@
-name: docs
+name: docs / digest
 
 on:
   workflow_dispatch:

.github/workflows/docs/docs-mac.yml

@@ -1,4 +1,4 @@
-name: docs
+name: docs / mac
 
 on:
   workflow_dispatch:

build.gradle.kts

@@ -66,7 +66,7 @@ subprojects {
     //       plugins are available to be used there,
     tasks.withType<DokkaTask>().configureEach {
         val docVersionsDir = rootProject.projectDir.resolve("docs/api/${project.name}")
-        val currentVersion = rootProject.version.toString()
+        val currentVersion = project.version.toString()
 
         val currentDocsDir = docVersionsDir.resolve(currentVersion)
         outputDirectory.set(currentDocsDir)