Fix version of Elixir to run with OTP 26

Also include riscv target in the precompilation list.

Author: philss

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
               elixir: 1.11.4
               otp: 23.3.4
           - pair:
-              elixir: 1.14.3
+              elixir: 1.14.5
               otp: "26.0"
             lint: lint
     steps:

.github/workflows/release.yml

@@ -22,6 +22,7 @@ jobs:
           - { target: aarch64-unknown-linux-musl  , os: ubuntu-20.04 , use-cross: true }
           - { target: aarch64-unknown-linux-gnu   , os: ubuntu-20.04 , use-cross: true }
           - { target: aarch64-apple-darwin        , os: macos-11      }
+          - { target: riscv64gc-unknown-linux-gnu , os: ubuntu-20.04 , use-cross: true }
           - { target: x86_64-apple-darwin         , os: macos-11      }
           - { target: x86_64-unknown-linux-gnu    , os: ubuntu-20.04  }
           - { target: x86_64-unknown-linux-musl   , os: ubuntu-20.04 , use-cross: true }