Release notes and feedback page for v11

There's a draft release at https://webschemas.org/docs/releases.html#v11

Changes in Core section:

• Issue typo #2733: Fixed typo in description of ReceiveAction.
• Issue Example 3 of VideoGame is incorrect #2746: Fixed invalid JSON-LD in example #eg-0449 on VideoGame.

Changes in Pending section:

• issue Online-only events #1842 implemented in PR Added examples for online and mixed online & offline events #2744: Added examples for online and mixed online & offline events. Attacted to Event, eventAttendanceMode, and VirtualLocation descriptions.
• PR Remove subproperty relationship between hasCategoryCode and hasPart #2737: Removed subproperty relationship between hasCategoryCode and hasPart.
• issue Add a (wikidata) example to /sameAs #2482 implemented in PR Add examples for sameAs, titleEIDR and editEIDR #2736: Added examples for sameAs, titleEIDR, and editEIDR properties.
• issue New types for stories #2646 implemented in PR Issue #2646: Added AmpStory #2719: Added new AmpStory type - "A creative work with a visual storytelling format intended to be viewed online, particularly on mobile devices.
• issue Proposal to add support for explicit identification of price categories such as sale price #2712 implemented in PR #2712: First cut at support for structured price types #2716: Added new PriceTypeEnumeration Enumeration type with values InvoicePrice, ListPrice, MSRP, MinimumAdvertisedPrice, SRP, SalePrice. Added to range of priceType property on the UnitPriceSpecification and CompoundPriceSpecification types.
• issue Proposal to add support for explicit identification of price types such as installments and subscriptions #2689 implemented in PR #2689 First cut at support for price components #2715: Added new PriceComponentTypeEnumeration Enumeration type with values Installment, Subscription, Downpayment, ActivationFee, CleaningFee, DistanceFee. Added to range of new priceComponentType property on type UnitPriceSpecification. Added new billingStart and billingDuration properties on type UnitPriceSpecification.
• issue Hypertext audio/video navigation proposal ('hypertoc') #2766: Added new HyperToc, HyperTocEntry types, tocEntry, tocContinuation and utterances properties to support navigation and annotation within MediaObject content.
• issue Expand VideoObject schema to include SeekToAction markup to handle URL and timestamp values #2722 implemented in PR Update issue-2722.ttl #2732: Added SeekToAction type to be used as a value for the potentialAction property on a VideoObject type.
• issue Expand VideoObject schema to include SeekToAction markup to handle URL and timestamp values #2722 implemented in PR Update issue-2722.ttl #2732: Added SolveMathAction, for sites than can analyze a mathematical expression, potentially solving or simplifying it.