Bump rules_jvm_external version in Bazel docs

RELNOTES:
PiperOrigin-RevId: 275284955
diff --git a/site/docs/android-instrumentation-test.md b/site/docs/android-instrumentation-test.md
index 88d252e..d892ad9 100644
--- a/site/docs/android-instrumentation-test.md
+++ b/site/docs/android-instrumentation-test.md
@@ -403,8 +403,8 @@
 ```python
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
-RULES_JVM_EXTERNAL_TAG = "1.1" # Or use the latest version on https://github.com/bazelbuild/rules_jvm_external
-RULES_JVM_EXTERNAL_SHA = "ade316ec98ba0769bb1189b345d9877de99dd1b1e82f5a649d6ccbcb8da51c1f"
+RULES_JVM_EXTERNAL_TAG = "2.8"
+RULES_JVM_EXTERNAL_SHA = "79c9850690d7614ecdb72d68394f994fef7534b292c4867ce5e7dec0aa7bdfad"
 
 http_archive(
     name = "rules_jvm_external",