Fix actions/upload-artifact deprecation

Summary:
X-link: facebookincubator/zstrong#970

actions/upload-artifact < v4 is deprecated and will not be supported after November 30, 2024.[1] Migrate to v4 instead -- the API used by fbcode_builder is not changed by this version bump.

[1] https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/

X-link: facebook/folly#2284

Reviewed By: yfeldblum

Differential Revision: D61730024

Pulled By: Orvid

fbshipit-source-id: 37eb13c6257a233ae170aa44aadeeb35a01568b1

build/fbcode_builder/getdeps.py

@@ -1180,7 +1180,7 @@ def write_job_for_platform(self, platform, args):  # noqa: C901
                 f"--final-install-prefix /usr/local\n"
             )
 
-            out.write("    - uses: actions/upload-artifact@v2\n")
+            out.write("    - uses: actions/upload-artifact@v4\n")
             out.write("      with:\n")
             out.write("        name: %s\n" % manifest.name)
             out.write("        path: _artifacts\n")