Update Learning Hub webpages on NCEAS website

[hdolinh]

• [x] add new Oct coreR dates on front page
• [x] LH google calendar (coreR, LTER, MEDS, ADC, OSS)
• [x] coreR webpage updates

[hdolinh]

• [x] update Director's Scholarship language and add new Qualtrics application link on LH Opportunities page

[hdolinh]

• [x] get feedback on layout + language on new coreR webpage