v1.3.1: Fix use of `inputs.install-package` variable

What's Changed

• Pin example uses to v1 by @rikhuijzer in #20
• Mention how to set terminal width by @rikhuijzer in #19
• Simplify the key setup instructions by @rikhuijzer in #21
• Update use of inputs.install-package variable by @hannahilea in #29

New Contributors

• @rikhuijzer made their first contribution in #20
• @hannahilea made their first contribution in #29

Full Changelog: v1.3.0...v1.3.1