test: reduce ta-lib test accuracy to align with ta-lib 0.6.5

Precision for ta-lib 0.6.x was increased
but is lower by 0001 than what was in the freqtrade ta-lib fix

https://github.com/TA-Lib/ta-lib/blob/main/src/ta_func/ta_utility.h#L257

This won't be a problem for any normal usdt pair.
shitcoins on some exchanges (e.g gate) with 12 zeros before the first significant digit wouldn't have worked today, either.

tests/test_talib.py

@@ -5,11 +5,11 @@ import talib.abstract as ta
 def test_talib_bollingerbands_near_zero_values():
     inputs = pd.DataFrame(
         [
-            {"close": 0.00000010},
-            {"close": 0.00000011},
-            {"close": 0.00000012},
-            {"close": 0.00000013},
-            {"close": 0.00000014},
+            {"close": 0.000010},
+            {"close": 0.000011},
+            {"close": 0.000012},
+            {"close": 0.000013},
+            {"close": 0.000014},
         ]
     )
     bollinger = ta.BBANDS(inputs, matype=0, timeperiod=2)