fix: improve code formatting in benchmark C files

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
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    status: passed
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    status: passed
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    status: na
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    status: na
  - task: lint_c_src
    status: na
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    status: na
  - task: lint_c_benchmarks
    status: passed
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    status: na
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    status: passed
---

Author: 0PrashantYadav0

lib/node_modules/@stdlib/blas/ext/base/ssort2hp/benchmark/c/benchmark.unsorted_random.length.c

@@ -101,8 +101,8 @@ static double benchmark1( int iterations, int len ) {
 	float *y;
 	int i;
 
-	x = ( float * )malloc( len * sizeof(float) );
-	y = ( float * )malloc( len * sizeof(float) );
+	x = (float *)malloc( len * sizeof(float) );
+	y = (float *)malloc( len * sizeof(float) );
 	for ( i = 0; i < len; i++ ) {
 		x[ i ] = ( rand_float()*20.0f ) - 10.0f;
 		y[ i ] = ( rand_float()*20.0f ) - 10.0f;
@@ -138,8 +138,8 @@ static double benchmark2( int iterations, int len ) {
 	float *y;
 	int i;
 
-	x = ( float * )malloc( len * sizeof(float) );
-	y = ( float * )malloc( len * sizeof(float) );
+	x = (float *)malloc( len * sizeof(float) );
+	y = (float *)malloc( len * sizeof(float) );
 	for ( i = 0; i < len; i++ ) {
 		x[ i ] = ( rand_float()*20.0f ) - 10.0f;
 		y[ i ] = ( rand_float()*20.0f ) - 10.0f;