[Jakarta Cdi] Correctly cast the UnmanagedInstance values

[mpkorstanje]

Fixes: #2242 for Jakarta Cdi

[codecov]

Codecov Report

Merging #2250 (0754285) into main (609f284) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main    #2250      +/-   ##
============================================
+ Coverage     82.98%   83.01%   +0.02%     
- Complexity     2339     2340       +1     
============================================
  Files           307      307              
  Lines          8324     8324              
  Branches        768      768              
============================================
+ Hits           6908     6910       +2     
+ Misses         1111     1110       -1     
+ Partials        305      304       -1     

Impacted Files	Coverage Δ	Complexity Δ
...ava/io/cucumber/jakarta/cdi/CdiJakartaFactory.java	96.96% <100.00%> (+6.06%)	10.00 <3.00> (+1.00)

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