Complete commits list: 3.9.0...3.9.1

Summary:

• Localization: added milliseconds and microseconds to Russian locale by @daniser in briannesbitt/Carbon#3169
• Fix overflow issue for is-month by @kylekatarnls in briannesbitt/Carbon#3170
• Fix ->is('02-29') by @kylekatarnls in briannesbitt/Carbon#3171
• Fix Incorrect Type Inference when Declaring Macros by @liamduckett in briannesbitt/Carbon#3174
• feat: Apply Laravel fallback locale by @daniser in briannesbitt/Carbon#3168
• Add missing @param-closure-this by @kylekatarnls in briannesbitt/Carbon#3175
• Add missing type for method parameter by @riesjart in briannesbitt/Carbon#3176
• Update sponsors by @github-actions in briannesbitt/Carbon#3177
• [Danish] 2-letter day abbreviations + 3-letter abbreviation of ‘May’ by @kokoshneta in briannesbitt/Carbon#3183
• Update sponsors by @github-actions in briannesbitt/Carbon#3186
• Reduce segfault risk in PHP 8.3.20 by @kylekatarnls in briannesbitt/Carbon#3187

New Contributors

• @daniser made their first contribution in briannesbitt/Carbon#3169
• @liamduckett made their first contribution in briannesbitt/Carbon#3174
• @riesjart made their first contribution in briannesbitt/Carbon#3176