source-snowflake: Fix out-of-range numeric value

Our `TestBasicDatatypes` test included an out-of-range value for
a fixed-point numeric column which was previously rounded but now
Snowflake just rejects when we try to insert it. I've opted to fix
this by simply changing that value to something else that's within
the declared range -- it's not our business to validate Snowflake
numeric rounding behavior so long as we're processing whatever we
get back from them correctly.

source-snowflake/.snapshots/TestBasicDatatypes-main

@@ -2,7 +2,7 @@
 # Collection "acmeCo/test/test_basicdatatypes_77528227": 3 Documents
 # ================================
 {"BDATA":"7loRpQ==","BIT":false,"DATA":"DCBA","FDATA":2.64,"ID":3,"X":0,"Y":0,"_meta":{"op":"c","source":{"schema":"PUBLIC","table":"test_BasicDatatypes_77528227","seq":2,"off":0}}}
-{"BDATA":"/w==","BIT":false,"DATA":"    ","FDATA":0.00001,"ID":4,"X":-9999,"Y":100,"_meta":{"op":"c","source":{"schema":"PUBLIC","table":"test_BasicDatatypes_77528227","seq":2,"off":1}}}
+{"BDATA":"/w==","BIT":false,"DATA":"    ","FDATA":0.00001,"ID":4,"X":-9999,"Y":-0.99,"_meta":{"op":"c","source":{"schema":"PUBLIC","table":"test_BasicDatatypes_77528227","seq":2,"off":1}}}
 {"BDATA":null,"BIT":null,"DATA":null,"FDATA":null,"ID":5,"X":null,"Y":null,"_meta":{"op":"c","source":{"schema":"PUBLIC","table":"test_BasicDatatypes_77528227","seq":2,"off":2}}}
 # ================================
 # Final State Checkpoint

source-snowflake/capture_test.go

@@ -70,7 +70,7 @@ func TestBasicDatatypes(t *testing.T) {
 
 	tb.Insert(ctx, t, tableName, [][]any{
 		{3, "DCBA", []byte{0xEE, 0x5A, 0x11, 0xA5}, 2.64, false, 0, 0},
-		{4, "    ", []byte{0xFF}, 0.00001, false, -9999, 99.999},
+		{4, "    ", []byte{0xFF}, 0.00001, false, -9999, -0.99},
 		{5, nil, nil, nil, nil, nil, nil},
 	})
 	t.Run("main", func(t *testing.T) { verifiedCapture(ctx, t, cs) })