ci: bump pinned to Rust 1.65

Author: BurntSushi

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
         include:
         - build: pinned
           os: ubuntu-latest
-          rust: 1.61.0
+          rust: 1.65.0
         - build: stable
           os: ubuntu-latest
           rust: stable

README.md

@@ -129,7 +129,7 @@ Crate features:
 
 ### Minimum Rust version policy
 
-This crate's minimum supported `rustc` version is `1.46.0`.
+This crate's minimum supported `rustc` version is `1.65.0`.
 
 The current policy is that the minimum Rust version required to use this crate
 can be increased in minor version updates. For example, if `crate 1.0` requires