Fix missing oxford commas. (#408)

Co-authored-by: Robin Berjon <[email protected]>
Co-authored-by: Jeffrey Yasskin <[email protected]>

index.html

@@ -663,7 +663,7 @@
 recognizable or obvious to a user within a particular interaction. Visiting a website may involve
 the actors that contribute to operating that site, but also actors with network access,
 which may include: Internet service providers; other network operators; local institutions providing
-a network connection including schools, libraries or universities; government intelligence services;
+a network connection including schools, libraries, or universities; government intelligence services;
 malicious hackers who have gained access to the network or the systems of any of the other actors.
 High-level threats including [=surveillance=] may be pursued by these actors. Pervasive monitoring,
 a form of large-scale, indiscriminate surveillance, is a known attack on the privacy of users of the
@@ -793,9 +793,9 @@
 no way of knowing that a person is vulnerable.
 
 Some individuals may be more vulnerable to privacy risks or harm as a result of
-collection, misuse, loss or theft of personal data because:
+collection, misuse, loss, or theft of personal data because:
 
-* of their attributes, interests, opinions or behaviour;
+* of their attributes, interests, opinions, or behaviour;
 * of the situation or setting (e.g. where there is information asymmetry or other
 power imbalances);
 * they lack the capacity to fully assess the risks;
@@ -807,12 +807,12 @@
 
 Additional privacy protections may be needed for personal data of vulnerable
 people or [sensitive information](#hl-sensitive-information) which could cause
-someone to become vulnerable if their personal data is collected, used or
-shared (e.g. blocking tracking elements, sensor data or information about
+someone to become vulnerable if their personal data is collected, used, or
+shared (e.g. blocking tracking elements, sensor data, or information about
 installed software or connected devices).
 
 While sometimes others can help vulnerable people assess privacy risks and
-make decisions about privacy (such as parents, [=guardians=] and peers), everyone
+make decisions about privacy (such as parents, [=guardians=], and peers), everyone
 has their own right to privacy.
 
 ### Guardians {#guardians}
@@ -929,7 +929,7 @@
 captured in the same picture would prefer their participation not to be disclosed. Another example
 of such issues are sites that enable people to upload their contacts: the person performing the
 upload might be more open to disclosing their social networks than the people they are connected to
-are. Such issues do not necessarily admit simple, straightforward solutions but they need to be
+are. Such issues do not necessarily admit simple, straightforward solutions, but they need to be
 carefully considered by people building websites.
 
 ### Transparency and Research {#transparency-for-research}