reconciler: Tiny adjustment to a log message

[draychev]

Tweak the verbiage and capitalization of an error message. Remove .String() as NamespacedName already implements Stringer interface: https://github.com/kubernetes/kubernetes/blob/e79a873b4c0d6ae4d2cd49462e034999f80147d2/staging/src/k8s.io/apimachinery/pkg/types/namespacedname.go#L19-L39

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Affected area:

• New Functionality [ ]
• Documentation [ ]
• Install [ ]
• Control Plane [ ]
• CLI Tool [ ]
• Certificate Management [ ]
• Networking [ ]
• Metrics [ ]
• SMI Policy [ ]
• Security [ ]
• Tests [ ]
• CI System [ ]
• Performance [ ]
• Other [ ]

Please answer the following questions with yes/no.

• Does this change contain code from or inspired by another project? If so, did you notify the maintainers and provide attribution?

[codecov-io]

Codecov Report

Merging #2357 (7b37a1b) into main (e59da65) will decrease coverage by 0.21%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2357      +/-   ##
==========================================
- Coverage   57.25%   57.04%   -0.22%     
==========================================
  Files         149      149              
  Lines        6660     6660              
==========================================
- Hits         3813     3799      -14     
- Misses       2842     2856      +14     
  Partials        5        5              

Impacted Files	Coverage Δ
pkg/configurator/validating_webhook.go	68.84% <0.00%> (-10.15%)	⬇️
pkg/envoy/lds/inmesh.go	54.09% <0.00%> (ø)

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