Disable 1.13 CI

Author: JohnTitor

.github/workflows/bors.yml

@@ -237,7 +237,9 @@ jobs:
           stable,
           beta,
           nightly,
-          1.13.0,
+          # FIXME: Disabled due to:
+          # error: failed to parse registry's information for: serde
+          #1.13.0,
           1.19.0,
           1.24.0,
           1.25.0,
@@ -270,7 +272,9 @@ jobs:
           - { toolchain: beta, os: macos-12 }
           - { toolchain: nightly, os: macos-12 }
           # Use macOS 11 for older toolchains as newer Xcode donesn't work well.
-          - { toolchain: 1.13.0, os: macos-11 }
+          # FIXME: Disabled due to:
+          # error: failed to parse registry's information for: serde
+          #- { toolchain: 1.13.0, os: macos-11 }
           - { toolchain: 1.19.0, os: macos-11 }
           - { toolchain: 1.24.0, os: macos-11 }
           - { toolchain: 1.25.0, os: macos-11 }