Update README (#18)

* replace tab with space

* fix yml file

Author: sarahmish

.github/workflows/readme.yml

@@ -12,8 +12,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: '3.8'
-        os: ubuntu-latest
+        python-version: [3.8]
+        os: [ubuntu-latest]
     steps:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}

README.md

@@ -54,12 +54,12 @@ data.head()
 which should show a signal with `timestamp` and `value`.
 ```
      timestamp      value
-0	1222840800	 6.357008
-1	1222862400	12.763547
-2	1222884000	18.204697
-3	1222905600	21.972602
-4	1222927200	23.986643
-5	1222948800	24.906765
+0   1222840800   6.357008
+1   1222862400  12.763547
+2   1222884000  18.204697
+3   1222905600  21.972602
+4   1222927200  23.986643
+5   1222948800  24.906765
 ```
 
 In this example we use `gpt_detector` pipeline and set some hyperparameters. In this case, we set the thresholding strategy to dynamic. The hyperparameters are optional and can be removed.