Update dependency azure-identity to v1.16.1 (#23)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

requirements.txt

@@ -2,7 +2,7 @@ kubernetes==30.1.0
 kopf==1.37.2
 # Do not use newest version as it removes some fields from the flexible server Configuration class (e.g. is_read_only)
 azure-mgmt-rdbms==10.2.0b17
-azure-identity==1.15.0
+azure-identity==1.16.1
 azure-mgmt-resource==23.1.1
 psycopg2-binary==2.9.9
 azure-mgmt-privatedns==1.1.0