test: fix test cases

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---

Author: Shabareesh Shetty

lib/node_modules/@stdlib/blas/base/dsbmv/test/fixtures/column_major_l.json

@@ -3,7 +3,7 @@
   "uplo": "lower",
   "N": 3,
   "K": 1,
-  "alpha": 2.0,
+  "alpha": 1.0,
   "A": [ 4.0, 1.0, 5.0, 2.0, 6.0, 0.0 ],
   "A_mat": [
     [ 4.0, 1.0, 0.0 ],
@@ -17,7 +17,7 @@
   "x": [ 1.0, 1.0, 1.0 ],
   "strideX": 1,
   "offsetX": 0,
-  "beta": 1.0,
+  "beta": 2.0,
   "y": [ 1.0, 1.0, 1.0 ],
   "strideY": 1,
   "offsetY": 0,

lib/node_modules/@stdlib/blas/base/dsbmv/test/fixtures/row_major_l.json

@@ -10,6 +10,7 @@
     [ 1.0, 5.0, 2.0 ],
     [ 0.0, 2.0, 6.0 ]
   ],
+  "LDA": 2,
   "strideA1": 2,
   "strideA2": 1,
   "offsetA": 0,