doc(contrib): remove rls in release process

Author: weihanglo

src/doc/contrib/src/process/release.md

@@ -47,7 +47,6 @@ subup --up-branch update-cargo \
     --test="src/tools/linkchecker tidy \
         src/tools/cargo \
         src/tools/rustfmt \
-        src/tools/rls" \
     src/tools/cargo
 ```
 
@@ -61,8 +60,7 @@ subup --up-branch update-beta-cargo \
     --test="src/tools/linkchecker tidy \
         src/tools/cargo \
         src/tools/rustfmt \
-        src/tools/rls" \
-    rust-1.63.0:src/tools/cargo
+    rust-1.66.0:src/tools/cargo
 ```
 
 [@ehuss]: https://github.com/ehuss/