.github: bump macos-12 to macos-13

Author: ee7

Diff for: .github/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
             arch: x86-64
 
           - os: macos
-            runs-on: macos-12
+            runs-on: macos-13
             arch: x86-64
 
           - os: windows
@@ -84,7 +84,7 @@ jobs:
           - runs-on: ubuntu-22.04
             zig_target: riscv64-linux-musl
 
-          - runs-on: macos-12
+          - runs-on: macos-13
             zig_target: aarch64-macos-none
 
           - runs-on: ubuntu-22.04

Diff for: .github/workflows/fetch-configlet.yml

@@ -19,7 +19,7 @@ jobs:
             runs-on: ubuntu-22.04
 
           - os: macos
-            runs-on: macos-12
+            runs-on: macos-13
 
           - os: windows
             runs-on: windows-2022

Diff for: .github/workflows/tests.yml

@@ -22,7 +22,7 @@ jobs:
             arch: x86-64
 
           - os: macos
-            runs-on: macos-12
+            runs-on: macos-13
             arch: x86-64
 
           - os: windows