build: rename feature flags to ring and ssl

Author: kaitlin-smith-anaplan

testcontainers/Cargo.toml

@@ -44,10 +44,10 @@ ulid = { version = "1.1.3", optional = true }
 url = { version = "2", features = ["serde"] }
 
 [features]
-default = ["ssl"]
-ssl = ["bollard/ssl"]
+default = ["ring"]
+ring = ["bollard/ssl"]
 aws-lc-rs = ["bollard/aws-lc-rs"]
-ssl_providerless = ["bollard/ssl_providerless"]
+ssl = ["bollard/ssl_providerless"]
 blocking = []
 watchdog = ["signal-hook", "conquer-once"]
 http_wait = ["reqwest"]