Chore: Update outdated link references, also as suggested by CodeRabbit

Author: amotl

docs/install/cloud/aws/ec2-setup.rst

@@ -199,8 +199,8 @@ See also :ref:`crate-reference:discovery.ec2.availability_zones`.
 .. _3.3: https://github.com/crate/crate/blob/3.3/blackbox/docs/config/cluster.rst#discovery
 .. _Amazon EC2: https://aws.amazon.com/ec2/
 .. _assign them with an IAM role: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/attach-iam-role.html
-.. _AWS guide: httsp://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html
+.. _AWS guide: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html
 .. _EC2 API: https://docs.aws.amazon.com/AWSEC2/latest/APIReference/Welcome.html
 .. _IAM roles: https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles.html
-.. _latest: https://crate.io/docs/crate/reference/en/latest/config/cluster.html#discovery
-.. _sign the requests: https://docs.aws.amazon.com/general/latest/gr/signing_aws_api_requests.html
+.. _latest: https://cratedb.com/docs/crate/reference/en/latest/config/cluster.html#discovery
+.. _sign the requests: https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_sigv.html