chore(deps): use bazel mirror for deps (#38)

Thanks @chenxiao0228.

See bazelbuild/bazel#21340

deps.bzl

@@ -7,21 +7,24 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
 
 def _urls(arch, version):
+    url = "https://github.com/vscode-shellcheck/shellcheck-binaries/releases/download/{version}/shellcheck-{version}.{arch}.tar.gz".format(
+        version = version,
+        arch = arch.replace("_", ".", 1),
+    )
+
     return [
-        "https://github.com/vscode-shellcheck/shellcheck-binaries/releases/download/{version}/shellcheck-{version}.{arch}.tar.gz".format(
-            version = version,
-            arch = arch.replace("_", ".", 1),
-        ),
+        url.replace("https://", "https://mirror.bazel.build/"),
+        url,
     ]
 
 def shellcheck_dependencies():
     version = "v0.9.0"
     sha256 = {
         "darwin_aarch64": "a75b912015aaa5b2a48698b63f3619783d90abda4d32a31362209315e6c1cdf6",
-        "darwin_x86_64":   "d1244da2aa5d0c2874f3a4a680c6ac79a488ff6dbf9928e12dc80ff3fdc294db",
-        "linux_x86_64":    "0ab5711861e6fcafad5aa21587ee75bbd2b16505d56f41c9ba1191a83d314074",
-        "linux_aarch64":    "b5633bd195cfe61a310bd8dcff2514855afefea908942a0fd4d01fa6451cb4e6",
-        "linux_armv6hf":  "4791d36d84a626c4366746d14ad68daf2c07f502da09319c45fa6c5c0a847aa9",
+        "darwin_x86_64": "d1244da2aa5d0c2874f3a4a680c6ac79a488ff6dbf9928e12dc80ff3fdc294db",
+        "linux_aarch64": "b5633bd195cfe61a310bd8dcff2514855afefea908942a0fd4d01fa6451cb4e6",
+        "linux_armv6hf": "4791d36d84a626c4366746d14ad68daf2c07f502da09319c45fa6c5c0a847aa9",
+        "linux_x86_64": "0ab5711861e6fcafad5aa21587ee75bbd2b16505d56f41c9ba1191a83d314074",
         "windows_x86_64": "a0f021057b6d6a69a22f6b0db0187bcaca3f5195385e92a7555ad63a6e39ee15",
     }