fix typos in release notes

Author: sebhmg

docs/content/release/0.14.0-notes.rst

@@ -409,7 +409,7 @@ Closed Issues
 * `#857 <https://github.com/simpeg/simpeg/issues/857>`__: DOC: Broken link
 * `#850 <https://github.com/simpeg/simpeg/issues/850>`__: Can't set a waveform on initialized BaseTDEMSrc object
 * `#847 <https://github.com/simpeg/simpeg/issues/847>`__: Renaming of methods' Problems
-* `#846 <https://github.com/simpeg/simpeg/issues/846>`__: Standard deviation and it's place in the code base
+* `#846 <https://github.com/simpeg/simpeg/issues/846>`__: Standard deviation and its place in the code base
 * `#842 <https://github.com/simpeg/simpeg/issues/842>`__: Static drape topo not on surface.
 * `#787 <https://github.com/simpeg/simpeg/issues/787>`__: Plotting integrated sensitivity for DC resistivity problem.
 * `#765 <https://github.com/simpeg/simpeg/issues/765>`__: DOC: Source code not linked, 404

docs/content/release/0.15.0-notes.rst

@@ -109,7 +109,7 @@ Pull requests
 * `#983 <https://github.com/simpeg/simpeg/pull/983>`__: Update README.rst
 * `#984 <https://github.com/simpeg/simpeg/pull/984>`__: typo in the init
 * `#986 <https://github.com/simpeg/simpeg/pull/986>`__: Update README.rst
-* `#987 <https://github.com/simpeg/simpeg/pull/987>`__: Ensure the 2D IP simulation stores it's scale array as a float
+* `#987 <https://github.com/simpeg/simpeg/pull/987>`__: Ensure the 2D IP simulation stores its scale array as a float
 * `#993 <https://github.com/simpeg/simpeg/pull/993>`__: Dc boundary conditions updates
 * `#994 <https://github.com/simpeg/simpeg/pull/994>`__: Update plot_inv_mag_MVI_Sparse_TreeMesh.py
 * `#997 <https://github.com/simpeg/simpeg/pull/997>`__: Update api_mag.rst