Fix error message typo in CRAMLazyReferenceSource

[ldgauthier]

Fix slightly misleading rogue paren following contig name in error message.

[codecov-io]

Codecov Report

Merging #1532 (4d9dfb7) into master (2e3da45) will increase coverage by 0.006%. The diff coverage is 100.000%.

@@               Coverage Diff               @@
##              master     #1532       +/-   ##
===============================================
+ Coverage     69.407%   69.412%   +0.006%     
- Complexity      8924      8925        +1     
===============================================
  Files            602       602               
  Lines          35521     35521               
  Branches        5904      5904               
===============================================
+ Hits           24654     24656        +2     
+ Misses          8533      8532        -1     
+ Partials        2334      2333        -1     

Impacted Files	Coverage Δ	Complexity Δ
...jdk/samtools/cram/ref/CRAMLazyReferenceSource.java	100.000% <100.000%> (ø)	2.000 <0.000> (ø)
...htsjdk/samtools/util/nio/DeleteOnExitPathHook.java	90.476% <0.000%> (+9.524%)	4.000% <0.000%> (+1.000%)