Loosen crc-fast version bounds to allow 1.10+ (#4610)

Fixes #4598.

Changes `crc-fast = "~1.9.0"` to `crc-fast = ">=1.9"` in
`aws-smithy-checksums`, bumps version to 0.64.8.

The `~1.9.0` constraint (>=1.9.0, <1.10.0) blocked downstream users from
resolving crc-fast 1.10.

Author: vcjana

rust-runtime/Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "aws-smithy-checksums"
-version = "0.64.7"
+version = "0.64.8"
 authors = [
     "AWS Rust SDK Team <aws-sdk-rust@amazon.com>",
     "Zelda Hessler <zhessler@amazon.com>",
@@ -18,7 +18,7 @@ aws-smithy-http = { path = "../aws-smithy-http" }
 aws-smithy-types = { path = "../aws-smithy-types", features = ["http-body-1-x"]}
 bytes = "1.11.1"
 # FIXME(https://github.com/smithy-lang/smithy-rs/issues/3981): Keep pinned until we have more comprehensive testing in place
-crc-fast = "~1.9.0"
+crc-fast = "1.9.0"
 hex = "0.4.3"
 http-1x = {package = "http", version = "1.3.1"}
 http-body-1x = {package = "http-body", version = "1.0.1"}