Fix patch release process (#6893)

Same as
https://github.com/open-telemetry/opentelemetry-java-contrib/pull/538

.github/scripts/get-version.sh

@@ -1,3 +1,3 @@
 #!/bin/bash -e
 
-grep -Po "val stableVersion = \"\K[0-9]+.[0-9]+.0" version.gradle.kts
+grep -Po "val stableVersion = \"\K[0-9]+.[0-9]+.[0-9]+" version.gradle.kts