feat: update version to 1.2.15 and clean up Gitea release workflow

.github/workflows/providers/gitea-release.yml

@@ -111,8 +111,4 @@ EOF
             exit 1
           fi
           echo "Successfully uploaded $file"
-        done
-      }
-    }
-  }
-}
+        done

platformio.ini

@@ -9,7 +9,7 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [common]
-version = "1.2.14"
+version = "1.2.15"
 
 [env:esp32dev]
 platform = espressif32