Move dependencies to stable version

gradle.properties

@@ -1,7 +1,7 @@
 org.gradle.caching=true
 group=io.ballerina.stdlib
 version=1.9.0-SNAPSHOT
-ballerinaLangVersion=2201.8.0-20230908-135700-74a59dff
+ballerinaLangVersion=2201.8.0
 puppycrawlCheckstyleVersion=10.12.0
 githubJohnrengelmanShadowVersion=8.1.1
 checkstyleToolVersion=10.12.0
@@ -18,9 +18,9 @@ marshallingVersion=2.0.5.Final
 protobufVersion=3.20.3
 
 # Dependencies
-stdlibIoVersion=1.6.0-20230911-134800-de06e28
-stdlibLogVersion=2.9.0-20230911-150900-2f32c1a
-stdlibCryptoVersion=2.5.0-20230911-142900-8807d07
-stdlibTimeVersion=2.4.0-20230911-140200-7f96f1e
-observeVersion=1.2.0-20230911-133500-b3d8db3
-observeInternalVersion=1.2.0-20230911-141700-4c0454a
+stdlibIoVersion=1.6.0
+stdlibLogVersion=2.9.0
+stdlibCryptoVersion=2.5.0
+stdlibTimeVersion=2.4.0
+observeVersion=1.2.0
+observeInternalVersion=1.2.0