prometheus-remote-write: bump cramjam to 2.8.4 in test-requirements (open-telemetry#3157)

Signed-off-by: emdneto <[email protected]>

Author: emdneto

exporter/opentelemetry-exporter-prometheus-remote-write/test-requirements.txt

@@ -3,7 +3,7 @@ certifi==2024.7.4
 charset-normalizer==3.3.2
 # We can drop this after bumping baseline to pypy-39
 cramjam==2.1.0; platform_python_implementation == "PyPy"
-cramjam==2.8.1; platform_python_implementation != "PyPy"
+cramjam==2.8.4; platform_python_implementation != "PyPy"
 Deprecated==1.2.14
 idna==3.7
 iniconfig==2.0.0