chore: fix examples & spec path (#493)

Author: imabhichow

.gitmodules

@@ -1,4 +1,3 @@
 [submodule "specification"]
 	path = specification
-	url = git@github.com:awslabs/private-aws-encryption-sdk-specification-staging.git
-	branch = fire-egg-staging
+	url = git@github.com:awslabs/aws-encryption-sdk-specification.git

README.md

@@ -79,7 +79,7 @@ class Example {
 }
 ```
 
-For detailed migration guidance and step-by-step examples, refer to the [Migration Examples](migration_examples/v3-to-v4/README.md). For more information, refer to the <a href="https://docs.aws.amazon.com/amazon-s3-encryption-client/latest/developerguide/java-v4-migration.html">Developer Guide</a>.
+For detailed migration guidance and step-by-step examples, refer to the [Migration Examples](https://github.com/aws/amazon-s3-encryption-client-java/tree/main/migration_examples/v3-to-v4). For more information, refer to the <a href="https://docs.aws.amazon.com/amazon-s3-encryption-client/latest/developerguide/java-v4-migration.html">Developer Guide</a>.
 
 
 #### V2 KMS Materials Provider to V4

migration_examples/v3-to-v4/README.md

@@ -1,6 +1,6 @@
 # S3 Encryption Client v3 to v4 Migration Examples
 
-> **Note:** This directory contains migration-specific examples for users upgrading from v3 to v4. If you're starting fresh with the S3 Encryption Client, see the [code examples](../../../src/examples/java/software/amazon/encryption/s3/examples).
+> **Note:** This directory contains migration-specific examples for users upgrading from v3 to v4. If you're starting fresh with the S3 Encryption Client, see the [code examples](https://github.com/aws/amazon-s3-encryption-client-java/tree/main/src/examples/java/software/amazon/encryption/s3/examples).
 
 This directory contains examples demonstrating the migration path from S3 Encryption Client v3 to v4, focusing on different commitment policy configurations. For more information, refer to the <a href="https://docs.aws.amazon.com/amazon-s3-encryption-client/latest/developerguide/java-v4-migration.html">Developer Guide</a>.