merge: Update GitHub Actions workflows (#123)

This pull request updates the GitHub Actions workflows used in the OpenDC repository, 
addressing (impending) deprecations, broken caching and publishing steps.

## Implementation Notes :hammer_and_pick:

* Fix GH Actions workflow for publishing Docker images
* Enable Gradle caching on master branch
* Pin version of GitHub Actions runner images 
* Publish to Maven Central in publish workflow 
* Upload distributions after CI build

1 files changed, 0 insertions, 4 deletions

diff --git a/build.gradle.kts b/build.gradle.kts
index 73f002b1..42a7f366 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -24,7 +24,3 @@ plugins {
     `dokka-conventions`
     `jacoco-aggregation`
 }
-
-allprojects {
-    version = "3.0-rc1"
-}