SUMMARY and Contract: add link to our 'Other tasks and "good first issues"' list

The previous commit starts mentioning our 'Other tasks "good first
issues"' list.

Mention it as well in the places we mention the "good first issue" link.

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

Author: ojeda

SUMMARY.md

@@ -64,6 +64,7 @@
   - [Issues](https://github.com/Rust-for-Linux/linux/issues)
   - [Unstable features](https://github.com/Rust-for-Linux/linux/issues/2)
   - [Good first issues](https://github.com/Rust-for-Linux/linux/contribute)
+  - [Other tasks and "good first issues"](https://github.com/Rust-for-Linux/linux/issues/1058)
 
 ## Documentation
 

src/Contact.md

@@ -33,6 +33,7 @@ It takes place once every kernel cycle, the first Wednesday after `-rc1` is tagg
   - [Submit a new issue](https://github.com/Rust-for-Linux/linux/issues/new/choose).
   - [Unstable features list](https://github.com/Rust-for-Linux/linux/issues/2).
   - [Good first issues](https://github.com/Rust-for-Linux/linux/contribute).
+  - [Other tasks and "good first issues"](https://github.com/Rust-for-Linux/linux/issues/1058).
 
 Please do ___not___ report security bugs in the GitHub issue tracker. Instead, please read the [Security bugs](https://docs.kernel.org/process/security-bugs.html) page in the kernel documentation.