Updates privacy policy + updates Melissa's position blog post (#815)

* Updates link to sponsorship offerings

Resolves #812

* Updates blog post bio for Melissa

Resolves #813

* Fixes a small typo in Melissa's position announcement

* Revert "Updates link to sponsorship offerings"

This reverts commit 78378e7.

* Updates the sponsorship PDF

* Updates privacy policy to v4

Renames v3 to policy-privacy-v3.md

* Adds Jekyll header to new v4 privacy policy document

* Fixes links to old, v3 privacy policy document

* Attempts to fix formatting problems of v4 privacy policy

The markdown was generated by Google Docs and is not quite right, nor the same
as the other privacy policy documents.

* Removes stray slash in CS&S + American English vs British

Uses Z instead of S in several words

updated deadline (#810)

Co-authored-by: Lai Yi Ohlsen <[email protected]>

modified job page, added new positions (#809)

Removes "Visualizations" tab and references to it (#808)

The entire "Visualizations" header tab is devoted to the now-broken Data Studio
dashboards that Chris created a long time ago. Those dashboards relied on the
stats-pipeline, but the stats-pipeline was shut down as a cost saving measure
and because nothing was really using it, other than those dashboards.
Additionally, the dashboard were unmaintained and very slow and possibly broken
in other ways.

publish OMG1 public report

publishing OMG 1 blog post (#806)

* publishing OMG 1 blog post

* updating file name

Fixes Analytics GA4 tag inclusion (#805)

The way I had done it previously was resulting in nested <script> tags, which
was, I think, breakting things. This commit splits out the loading of gtag/js
into its own script tag, and reduces ga.js to only javascript.

Replaces old Analytics tag with new GA4 tag (#804)

Universal Analytics (UA) is now retired, replaced by Google Analytics 4 (GA4).
This commit replaces the old UA tag with the new GA4 tag.

add melissa announcement blog post (#803)

* add melissa announcement blog post

* update text

Update post title (#801)