Pin crc32c to avoid build.rs failure (#3665)

## Motivation and Context
Works around zowens/crc32c#67

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Author: ysaito1001

rust-runtime/aws-smithy-checksums/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "aws-smithy-checksums"
-version = "0.60.8"
+version = "0.60.9"
 authors = [
   "AWS Rust SDK Team <aws-sdk-rust@amazon.com>",
   "Zelda Hessler <zhessler@amazon.com>",
@@ -16,7 +16,7 @@ repository = "https://github.com/smithy-lang/smithy-rs"
 aws-smithy-http = { path = "../aws-smithy-http" }
 aws-smithy-types = { path = "../aws-smithy-types" }
 bytes = "1"
-crc32c = "0.6.5"
+crc32c = "=0.6.5"
 crc32fast = "1.3"
 hex = "0.4.3"
 http = "0.2.8"