Fix typo in requirements.txt name in README

Author: FredericWantiez

README.md

@@ -134,7 +134,7 @@ We value the following contributions:
 
 ### How to contribute?
 
-1. Run `pip install -r requirements-dev.txt` to install all the dev
+1. Run `pip install -r requirements.txt` to install all the dev
    dependencies.
 2. Run `pre-commit run --all-files` and `make test` before pushing on the repo; CI should pass if
    these pass locally.

examples/Introduction.ipynb

@@ -328,7 +328,7 @@
     "\n",
     "ax1.plot(scale_samples)\n",
     "ax1.set_xlabel(\"Samples\")\n",
-    "ax.set_ylabel(\"scale\")"
+    "ax1.set_ylabel(\"scale\")"
    ]
   },
   {