Use the "1min" resample alias instead of "1T"

pandas removed the single-letter "T" frequency alias in 3.0, deprecated since
2.2, so the unpinned pandas in requirements.txt makes _process_raw_logs raise
ValueError on every rebuild. "1min" is accepted by both pandas 2.x and 3.x.

Author: atalman

aws/lambda/usage-log-aggregator/lambda_function.py

@@ -24,7 +24,7 @@
     r"^(?P<job>.+)\s/\s.+\((?P<s_name>[^,]+),\s(?P<s_id>[^,]+),\s(?P<s_count>[^,]+),\s(?P<platform>[^,]+)\)$"
 )
 # One minute according to the rule https://pandas.pydata.org/docs/reference/api/pandas.Series.resample.html
-RESAMPLING_WINDOW = "1T"
+RESAMPLING_WINDOW = "1min"
 DATETIME_FORMAT = "%Y-%m-%d %X"
 # NB: This is a work around to handle the case where requested job is retried
 MAX_RUN_ATTEMPT_TO_SCAN = 10