Tweak rc workflow steps

Author: jack-berg

RELEASING.md

@@ -44,18 +44,26 @@ the `semantic-convention` release version, e.g. `v1.21.0.1`
   * `export GPG_PASSWORD=<password>`
   * `export SONATYPE_USER=<user>`
   * `export SONATYPE_KEY=<key>`
+* Set `snapshot = false` in [build.gradle.kts](./build.gradle.kts):
+
+  ```
+  // start - updated by ./.github/workflows/prepare-release-branch.yml
+  val snapshot = false // <-- UPDATE THIS LINE
+  // end
+  ```
+
 * Adjust version tag to include `-rc.<num>` suffix (i.e. `-rc.1` for the first release candidate) in [build.gradle.kts](./build.gradle.kts):
 
   ```
   var ver = semanticConventionsVersion
-  ver += "-rc.1" // <-- ADD THIS LINE
   val release = findProperty("otel.release")
   if (release != null) {
     ver += "-" + release
   }
   if (snapshot) {
     ver += "-SNAPSHOT"
   }
+  ver += "-rc.1" // <-- ADD THIS LINE
   version = ver
   ```