fix: add --force to cargo install for cargo-deny and cargo-llvm-cov

Cached binaries in /root/.cargo-tools cause "already exists" errors
without --force. typeshare-cli already had --force; these two were missing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: claude

.dagger/src/index-platform-ci.ts

@@ -102,6 +102,7 @@ export async function runClauderonCi(
         "install",
         "cargo-deny",
         "--locked",
+        "--force",
         "--root",
         "/root/.cargo-tools",
       ])
@@ -153,6 +154,7 @@ export async function runClauderonCi(
         "install",
         "cargo-llvm-cov",
         "--locked",
+        "--force",
         "--root",
         "/root/.cargo-tools",
       ])